Lights have flickered back to life across Spain and Portugal after a massive blackout hit the Iberian peninsula stranding passengers in trains and hundreds of elevators while millions saw phone and internet coverage die.
Electricity had been restored to nearly 90 percent of mainland Spain early on Tuesday, the REE power operator said. Lights came on again in Madrid and in Portugal's capital Lisbon.
Barely a corner of the peninsula, which has a joint population of almost 60 million people, escaped the blackout.
But no firm cause for the shutdown has yet emerged, though wild rumours spread on messaging networks about cyber attacks.
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By Jamie Bullen
Thanks for following our live coverage of the blackouts across Spain and Portugal following massive power outages across the Iberian Peninsula.
Electricity supplies are returning across both countries this morning after blackouts saw thousands of train passengers stranded and left millions of people without phone and internet coverage.
Huge queues formed outside shops and banks as residents, tourists desperately sought to stockpile essentials and take out cash as they could amid the uncertainty.
Although this live page is now closing, there remains plenty of content on the MailOnline website.
Around 90 per cent of Spain's electricity is now restored though authorities are still working to establish the cause of the outage.
Take a look at how the massive outage froze Spain
By Jane Matthews
06:05
Spanish PM urges public not to speculate on cause of blackouts
By Jamie Bullen
Spanish Prime Minister Pedro Sanchez said a problem in the European grid caused the huge power outage that struck Spain, Portugal and parts of France.
Mr Sanchez (pictured) described the problem in the European grid as a 'strong oscillation' and added that the cause is still being determined.
He asked the public to refrain from speculation and said no theory about the cause of the outage had been discarded.
He went on to detail that, at 12.22pm on Monday, Spain's power grid lost 15 gigawatts, the equivalent of 60% of its national demand, in a matter of five seconds.
'We have never had a complete collapse of the system,' he added.
Mr Sanchez thanked the governments of France and Morocco where energy was being pulled from to restore power to north and southern Spain.
05:55
Power returns to virtually all of Spain
By Jamie Bullen
Spain has recovered more than 99% of its power following an unprecedented blackout that brought much of Spain and Portugal to a standstill, officials said.
Spanish power distributor Red Electrica said the figure was reached by 6am on Tuesday.
The blackout saw thousands of train passengers stranded and left millions of people without phone and internet coverage and access to cash from ATMs across the Iberian Peninsula.
Spanish Prime Minister Pedro Sanchez earlier vowed to have the entire country of 48 million with their lights back on by the end of the day.
Red Electrica head of operations Eduardo Prieto said the event was 'exceptional and extraordinary'.
05:02
Hospitals forced to transport patients amid power outage
By Brittany Chain
Pictured: A medical staffer relocating a patient in Pamplona, northern Spain, amid the nationwide outage.
04:20
Army to distribute generators and other material to the hardest-hit areas on Tuesday
By Brittany Chain
Spanish prime minister Sánchez said on Monday that the Army would begin distributing generators and other necessities to the hardest-hit regions as early as Tuesday in response to the crisis.
The country declared a state of emergency last night and said it was deploying 30,000 police officers as part of security measures to deal with the mayhem caused by the calamitous outage.
00:32
Pictured: Travellers prepare to spend the night at train stations
By Sophie Carlin
Astonishing pictures of would-be train passengers tucked up inside Red Cross blankets and coats, with piles of luggages, are emerging, as they prepare to spend the night in train stations with nowhere else to go.
Take a look:
23:33
Nowhere to go? Sleep at a train station - Spanish transport minister
By Sophie Carlin
The Spanish transport minister has said stranded passengers can sleep at train stations across the country amid the outage.
Oscar Puente said at least 15 stations, including Malaga, Madrid and Seville, will be open to those who need to take a train - and have nowhere else to go.
In a post on X, he said: 'The goal is to make it easier for people who need to take a train and have no other option to stay overnight.'
A branch of the Spanish military, called the UME, which is responsible for disaster relief, has given blankets to people in Atocha station in Madrid.
People wait with their luggage outside Atocha train station in Madrid
22:54
Passengers on three Spanish trains STILL waiting to be rescued
By Sophie Carlin
Passengers on three trains in Spain are still awaiting rescue, according to the country's state railway company.
Renfe's president Alvaro F Heredia said: 'Three trains remain to be rescued in collaboration with state security forces.
'Trains are now being recovered, the tracks are being cleared and the service is being organised.'
It comes after more than 35,000 people have been rescued across 114 operations today.
Mr Heredia said: 'The first priority has been to rescue and evacuate all trains carrying passengers.
Renfe said in a post to X that train service is gradually returing to normal and that all passengers are guaranteed to reach their fianl destination, despite the 'exceptional situation'.
22:41
More than 60 per cent of Spain switched back on
By Sophie Carlin
More than 60 per cent of Spain has had its power restored, the country's electricity operator has said.
At midnight local time, 61.35 per cent of the demand 'has now been recovered', according to REE.
78 per cent of the substations, it added, are 'energised'.
22:39
Lisbon airport reopens to passengers - but stay cautious
By Sophie Carlin
Lisbon Airport has now reopened to passengers, according to Portuguese news agency Lusa.
But the company that manages the airport, ANA, recommends travellers contact their airlines for information about their flights before turning up at the terminal.
The airport faced carnage earlier today with swathes of flights cancelled, police deployed at entrances and hundreds of people stranded - with large amounts of baggage.
22:35
Spanish premier meets with electricity bosses: 'We'll be working flat out, all night long'
By Sophie Carlin
Spain's Prime Minister has met with bosses of the country's electricity operator as power is gradually restored across the country.
Pedro Sanchez was pictured meeting with officials from REE at around 11.15pm.
It comes after he said the government would work 'all night long' to switch the power back on in its entirety.
In an address to Spanish citizens, he said:
All states resources are being mobilised to restore normal supply as quickly as possible.
He added:
We'll be working flat out, all night long. With professionalism and commitment. As Spain always does in these situations.
22:15
Spanish PM: 'A long night lies ahead'
By Sophie Carlin
Members of the Red Cross load water bottles on trolleys near Joaquin Sorolla train station in Valencia, Spain
Spanish Prime Minister Pedro Sanchez has said 'a long night lies ahead' in his latest national address.
The premier continued:
We will continue working to restore normality as soon as possible.
And pictures coming in from across the nation show citizens bracing themselves for a night impacted by disruption - such as near Valencia's Joaquin Sorolla station, where stranded travellers are preparing to spend the night.
22:09
WATCH: Fascinating timelapse shows Madrid plunged into darkness
By Sophie Carlin
Timelapse footage compiled by our MailOnline video team shows Madrid plunged into near-total darkness as Spain and Portugal battled a massive power outage today.
Take a look at the fascinating clip below:
21:52
WATCH: Madrid residents flock to shops amid nationwide power outage
By Sophie Carlin
The MailOnline video team has put together footage of residents in Madrid flocking to shops as the power goes out across Spain.
Take a look below:
21:50
Police presence across Spain grows amid fears of looting, road traffic accidents and public disorder
By Sophie Carlin
Spain's Interior Ministry has deployed 30,000 police officers to keep public order and stop any security incidents - especially on the roads, as some traffic lights are not working.
Prime Minister Pedro Sanchez said in his latest address: 'Citizens can and should remain calm.'
Plain-clothed officers have been sent out to many towns and cities across the country to stop looting - as many businesses have not been able to lower their electric shutters.
Meanwhile, police in Catalonia, known as the Mossos d'Esquadra, will deploy more than 7,000 officers overnight.
21:41
When life gives you lemons...
By Sophie Carlin
People in Lisbon have been spotted making the best of a bad situation amid today's nationwide power outage - by stargazing, playing cards and having a drink.
21:36
'Specific incident' with France-Spain power connector could be partly at fault
By Sophie Carlin
People leave the airport in Lisbon, Portugal, during the shutdown
The trade body representing the European power industry has said a 'specific incident' with a France-Spain interconnector could be partly at fault for the outage.
Kristian Ruby, general secretary of EURELECTRIC, told the BBC: 'There was a specific technical issue that arose there and hence the Spanish grid was disconnected from the broader European grid earlier today.'
But he said he would not normally have thought that would cause a power cut across the entire Iberian peninsula: 'So my assessment is there is likely to have been other elements in this equation that have caused this situation.'
He added the outage was a '50 year, if not 100 year incident... something very, very rare'.
21:18
Portugal PM: Full power to return 'within hours' - but after Spain
By Sophie Carlin
Acting Portuguese prime minister Luis Montenegro has said power will be restored to the country within hours - but it may take longer than in Spain.
The country's grid operator said earlier these kinds of operations are 'particularly complex' in Portugal compared to Spain as it relies only on its own resources.
Spain, by contrast, takes contributions from France and Morocco.
21:14
Spanish PM: Power restored in 50 per cent of country
By Sophie Carlin
Spanish Prime Minister Pedro Sanchez has said the grid has restored power to half of the country.
It is still not known what caused the mass outage, he added - and 'no hypothesis' has been ruled out.
Work continues to try to restore 100 per cent of the power by tomorrow, he said.
The PM said 15 gigawatts, equivalent to 60 per cent of demand, were lost from the grid in only five seconds - which is unprecedented.
21:02
WATCH: Madrid cheers as power is restored
By Sophie Carlin
Video footage compiled by our MailOnline video team shows show Madrid cheering at around 9.20pm as power was restored, with shouts and whistles in the street as lights come back on.
Take a look:
20:28
People use their phone's flashlights to walk in the dark near Plaza Mayor square, Madrid
By Taryn Pedler
20:26
Family watch the 25th April bridge with the lights shut down in Lisbon
By Taryn Pedler
20:18
No time to waste to bring back power, says Portuguese PM
By Taryn Pedler
Luis Montenegro, the Portuguese prime minister, said 'there was no time to waste' in restoring electricity to the nation after a major power outage.
'We are working together to respond quickly to the power outage that is still affecting the country. We are in constant contact with security forces, civil protection, the armed forces, hospitals and fuel supply companies to ensure response capacity in essential infrastructure and support for those in need,' he wrote.
Montenegro added: 'There is no time to waste! Our thanks to everyone who is focused on these priority tasks.'
20:12
Darkness creeps into Spain as day turns to night amid fears of looting
By Taryn Pedler
20:07
People in Spain spend evening in the darkness or candlelight amid power outages
By Taryn Pedler
20:06
Over 35 per cent of Spain’s power capacity restored
By Taryn Pedler
More than 35 per cent of Spain’s power capacity has now been restored, the country’s REE electricity operator has said.
REE was meeting '35.1 percent of demand', Eduardo Prieto, REE’s operations director, told Cadena Ser radio.
The company said earlier that power was being 'progressively' restored across the country.
20:03
Members of the Red Cross load water bottles on trolleys in Madrid
By Taryn Pedler
19:59
Spanish PM to give update shortly
By Taryn Pedler
Pedro Sanchez is set to speak shortly to provide an update after Spain's interior ministry declared a state of emergency.
The conference was scheduled to begin at 21:30 local time (20:30 BST), but appears to be delayed.
19:58
Power beginning to restore across parts of Lisbon, as well as Madrid
By Taryn Pedler
Power is reportedly beginning to trickle back into the Spanish and Portuguese capitals.
Reuters news agency reports various parts of central Madrid have got electricity back, with some areas of Lisbon following shortly after.
19:46
Commuters wait at a rail station that has come to a standstill amid power cuts in Madrid
By Taryn Pedler
19:38
Thousands of police deployed as outages continue on into evening
By Taryn Pedler
As Spain heads into evening darkness, the interior ministry has said it's deploying 30,000 police officers to maintain security.
They will be deployed nationwide, the ministry added.
19:35
Power appears to be returning in Madrid
By Taryn Pedler
Power appears to be returning in the Spanish capital, within some shops and the metro.
Some rural areas are reporting the power being restored.
Public transport, the trains and metro are still not open to the public but security is gathering at the entrance of Sol metro station for it to be opened soon.
Rural areas north of Madrid have reported the power and Wifi coming back.
19:22
Images from Madrid this evening as community attempt to raise spirits
By Taryn Pedler
A man staying in La Latina, Madrid, told MailOnline telephone and internet has been down since 9m local time.
'Metros down, traffic chaos, shops shutting for dear of looting,' John Southgate added.
'Good community spirit in La Latina area of Madrid - locals listenign to a single radio'.
19:13
More than 20% of Spain's power restored, says electricity operator
By Taryn Pedler
Spanish power operator Red Electrica has said more than 20 per cent of the country's affected power capacity has been restored.
Electricity supply is being 'progressively restored', the operator says in a post on X.
Some of this supply has been coming from domestic sources and some from France, the post adds.
19:11
No sign blackout was caused by cyberattack, says Portuguese grid operator REN
By Taryn Pedler
REN said Monday it had 'no information' that the mass power outages that hit the Iberian Peninsula were caused by a cyberattack.
REN board member Joao Conceicao told reporters the operator did not rule out that the blackout was due to a 'very large oscillation in the electrical voltages, first in the Spanish system, which then spread to the Portuguese system.
'There could be a thousand and one causes, it's premature to assess the cause,' he said, adding that REN was in permanent contact with Spain.
18:59
No flights from Lisbon until 10pm
By Taryn Pedler
Portugal's airport operator ANA said it does not expect flights to take off from Lisbon until 10pm local time.
Flights are running from Porto and Faro airports, but with limitations, it added.
18:56
Passengers queue at Barajas Airport in Madrid amid the nationwide power outage
By Taryn Pedler
18:51
Grid operator hopes to establish power in Porto in two hours
By Taryn Pedler
Portuguese grid operator REN said it hoped to reestablish the power supply in the country's second-largest city, Porto, within the next two hours and within five or six hours in the capital, Lisbon.
Spanish operator Red Electrica has been able to restore power to parts of the north and south peninsula.
18:47
Areas in Spain where power is now available
By Taryn Pedler
Red Electrica has revealed that power is now available in parts of the north and south peninsula.
Here are the areas where power has been restored to in parts:
Catalonia
Aragon
The Basque Country
Galicia
La Rioja
Asturias
Navarre
Castile
León
Extremadura
Andalusia.
18:38
Portuguese government's website down amid power cut
By Taryn Pedler
The website of the Portuguese government, portugal.gov.pt, is currently down and displaying an error message which reads: 'The government portal is currently unavailable. We will try to restore the service soon.'
18:35
Breaking:State of emergency declared in Spain
By Taryn Pedler
Spain's interior ministry has declared a state of emergency after today's nationwide power blackout.
The ministry added emergency status will be applied in the regions that request it.
18:35
Locals seen approaching police for advice amid blackout
By Taryn Pedler
18:32
Ukraine offers energy assistance to Spain, Portugal and France
By Taryn Pedler
Ukraine is offering its assistance to Spain, Portugal, and France following the blackouts.
Andrii Sybiha, the foreign minister, said that Kyiv has already been in contact with the three countries to share its 'extensive experience' with power outages.
18:02
Shelves in supermarkets emptied as people panic buy food and water supplies
By Taryn Pedler
18:00
Almost 300 people rescued from lifts in Madrid
By Taryn Pedler
Emergency services carried out 286 rescue operations on Monday to free people trapped inside elevators in Madrid during a nationwide power outage.
'What we are now dealing with more frequently are cases of people trapped in lifts. We have received 286 requests' for help, Isabel Diaz Ayuso, the head of Madrid’s regional government, said during an interview with Antena 3.
17:47
Holidaymakers have been left fuming following travel disruptions
By Taryn Pedler
One angry holidaymaker told MailOnline: 'Totally impossible to get into Lisbon Airport today, passengers sent home with a wave of the hand ! With no electricity, no possibility to use internet to review bookings or receive information from the user airline !
'As a result of the blackout, for one, Air France cancelled my flight AF1625 @15h55 today 28/4 and pushed me back to 30/April AF1195 @18h50. This change was done without additional payment, the fault does not lie with Air France.
'HOWEVER checking possible reservations to come home earlier I was aghast at the one way Air France prices Lisbon to Paris as "punishment" for the inconvenience caused to the airline by stranded passengers !
'One flight available 29/4 Economy 746€ Business 1107€ as for the following day 30/4 two flights with economy at 943€ or 1012€ Business with a startling 1506€ for a connecting flight through Madrid !
'I would invite you to have a look under "reservations" of airlines operating out of Lisbon for further surprises.
'Just imagine the exotic far flung destinations where we readers could fly to for these ridiculous prices !
'Had it been British AIrways or Easy Jet I'd have complained to the CAA or ABTA.
'Fingers crossed for return of the electrics !'
17:22
Pictured: Gridlocked traffic in Madrid during major power outage
By Katherine Lawton
17:06
Supermarket blocks entrance amid power blackout
By Katherine Lawton
A barricade has been spotted blocking the entrance to a supermarket due to the power blackout today in Lleida, Spain.
17:04
Vehicles stuck in gridlock in Madrid amid large scale outage
By Katherine Lawton
People have been spotted walking on parts of the roadway as vehicles are in gridlock at Cibeles Square in Madrid during the power outage.
17:00
Pictured: Chaos at Lisbon Airport amid power outage
By Katherine Lawton
16:51
Locals rush to stock up on food in Madrid
By Taryn Pedler
In a supermarket in Madrid, people were stocking up on water, eggs and milk and some shelves have already been left empty.
'I left work and the power suddenly went and people started buying,' Joanly Perez, a 33-year-old doctor in Madrid told Reuters. 'People aren’t sure what might happen and are buying basic essentials, just in case.'
Oliver Ortiz, a 45-year-old butcher, said he too was buying tins of food 'just in case'.
16:38
Spain's nuclear reactors safe from power outages, says council
By Taryn Pedler
Spain's nuclear safety council has said all seven of the country's nuclear reactors are safe.
Four of them stopped operating automatically once the power cut hit, but emergency generators immediately kicked in.
The other three reactors were not operating at the time, but emergency generators switched on anyway to keep them in a safe condition, the council added.
16:34
Fans left in the dark at Madrid Open after power cuts hit Spain
By Taryn Pedler
16:32
Electricity restored to areas in the north and south of Spain
By Taryn Pedler
Sanchez has said that electricity has been restored to some areas in the north and the south of Spain 'thanks to help from France and Morocco'.
'We urge you to turn to official channels for information,' he said, urging people in Spain to avoid failing 'for disinformation'.
16:28
EasyJet warns of flight disruptions
By Taryn Pedler
The airline has confirmed that the power blackout is impacting access to some airports and affecting its flight operations in Lisbon, Madrid and Barcelona.
'Like all airlines, we are experiencing some disruption to our flying programme meaning that some return flights from Lisbon and Madrid have been unable to operate,' EasyJet said in a statement.
It added that despite the chaos, its services at Porto and Faro airports are operating as scheduled.
EasyJet advised passengers to monitor local travel updates and flight trackers for the latest information.
16:24
Sanchez urges people to use phones responsibly as telecoms are at 'critical moment'
By Taryn Pedler
Continuing his address, Sanchez describes telecommunications as being at a critical moment and urges people to use their phones responsibly and only to make brief calls.
He says that digital banking and payment systems are operating normally.
Sanchez added that the National Security Council will also meet again today to evaluate any further measures that may be needed.
16:19
Spanish PM addresses nation
By Taryn Pedler
The Spanish prime minister, Pedro Sanchez, has begun a news conference.
He says there is no conclusive information on what caused the blackout.
He adds that for now, there are no public security issues.
16:17
People wait outside a closed metro station in Barcelona
By Taryn Pedler
16:15
Air traffic capacity to be reduced in some areas
By Taryn Pedler
Following the chaotic power outages across Spain, transport minister Oscar Puente took to X to confirm thatair traffic capacity will be reduced.
'Due to further outages in communications and radar nodes, we will reduce air traffic capacity by 30% in some sectors,' he wrote.
15:55
Train services will not be restored in Spain today, according to transport minister
By David Averre
The nationwide power outage will prevent Spain from restoring inter-city train services on Monday, the transport minister said, as the crisis left thousands of passengers stranded.
"Today it is not expected that the circulation of medium and long-distance trains will be restored... We are working so that, once the electricity supply is restored, we can resume those services, which will no longer be possible today," Oscar Puente wrote on X.
15:29
Spanish grid operator says Spain's power grid 'disconnected from the European system' due to a 'very strong oscillation' in the electrical network
By David Averre
A top Spanish energy official said blackouts across Spain and Portugal were caused by a 'very strong oscillation' in the electrical network.
Eduardo Prieto, director of Spanish transmission system operator Red Eléctrica, said this oscillation led Spain’s power system to 'disconnect from the European system, and the collapse of the Iberian electricity network'.
But he refused to speculate as to what had caused the power surge and declined to say if a cyberattack could have contributed to the blackout.
An 'oscillation' occurs when something disrupts the delicate balance between a grid's power supply and demand, which causes the frequency of the electricity to swing rapidly up or down.
15:13
Brits tell of disruption caused by power outages
By David Averre
Maddie Sephton, from London, was on the Madrid Metro when the power outage occurred, told Sky News that she was stuck on a train for 20 minutes before a staff member pried the doors open manually.
'We got on the train and everything was fine. But then everything went dark,' she said. Passengers had to climb 15 flights of stairs to get out of the metro.
An ex-pat called Lesley, has lived in Spain for 11 years with her husband, told the BBC that they are concerned about the effects of the outages.
'We are worried about food, water, cash and petrol in case this goes on for a couple of days,' she said.
'My husband is driving around now trying to find a petrol station that's open to get petrol for the generator so that we can plug in the fridge.'
And a British expat living in Barcelona told MailOnline that 'nobody seems to know what's going on' in Spain 'because nobody has signal'.
The English teacher said he only found out about the European blackout from British reports.
'I can get signal on my rooftop, but I can't get signal down below. One floor down I have nothing,' they said.
'The traffic lights are still working... The underground is not working apparently. Lots of parts of the public transport are not working.'
15:11
In pictures: Spain travel chaos
By David Averre
15:06
Power being restored to southern, northern and western Spain according to grid operator
By David Averre
Spanish power distributor Red Eléctrica said it has managed to bring large parts of southern, northern and western Spain back online, but added that restoring power fully to the country and neighbouring Portugal could take 6-10 hours.
The state grid operator is still yet to specify the cause of the outages.
15:01
Spain's nuclear power plants went offline amid power outage but are in 'safe condition'
By David Averre
Spain's nuclear power plants automatically stopped when a massive blackout hit, but diesel generators were keeping them in "safe condition", officials said.
The shutdown of the country's nuclear plants was "in line with their design" when confronted with an unexpected power outage, the Spanish Nuclear Safety Council (CSN) said in a statement.
Four reactors at three nuclear power plants were in operation when the outage struck and immediately went offline.
Reactors at two other nuclear plants were already stopped before the blackout and generators were also maintaining basic functions safely, the CSN said.
14:56
Vueling 'working to minimise impact' on travel
By james reynolds
Spanish airline Vueling said it was 'working to minimise the impact' of the blackouts on their flights in Spain 'and other markets' on Monday.
'Some of our flights may be affected. You can check the status of your flight here. We continue to monitor the situation,' a statement read.
14:47
EU chief say 'no indications' blackouts caused by cyber attack
EU chief Antonio Costa cast doubt on speculation the blackouts sweeping Spain and Portugal were caused by a cyber attack.
Costa said on Monday that 'at this point, there are no indications of any cyberattack'.
'Grid operators in both countries are working on finding the cause, and on restoring the electricity supply,' Costa, who heads the European Council representing EU member states, wrote on X, after being in touch with leaders in Spain and Portugal.
14:40
How a 'rare atmospheric event' could cause Spain's blackouts
REN, Portugal's grid operator says that the widespread blackouts over Spain and Portugal have been caused by a 'rare atmospheric phenomenon'.
The operator says that extreme temperature variations along the grid had led to 'anomalous oscillations' in very high-voltage power lines.
This effect, known as 'induced atmospheric variation' leads to power oscillations throughout the grid.
This causes the voltage and frequency of some parts of the grid to get out of sync with the rest of the grid.
The differences between the different sections can lead to irregular or excessive power flow to some areas, damaging equipment and triggering widespread power failures.
Fans walk through the dark gangways during a general power blackout during Day Seven of the Mutua Madrid Open at La Caja Magica on April 28, in Madrid
According to REN, these oscillations lead to 'successive disturbances across the interconnected European network' which caused today's blackouts.
Temperature differences lead to oscillations in the grid, primarily due to the sudden imbalance of electricity demand.
When one area on the grid is exceptionally hot, the demand for electricity increases as people turn on air conditioning units to cool their homes.
When the fluctuations between high-demand and low-demand areas are large enough, it can trigger oscillations capable of causing synchronisation issues.
14:26
Full restoration of power in Portugal could take 'up to a WEEK': grid operator
Full restoration of power in Portugal could take as long as a week, the country's electricity grid operator has warned.
Redes Energéticas Nacionais (REN) said in a statement that the outages appeared to have been caused by 'extreme temperature variations in the interior of Spain', leading to 'anomalous oscillations in the very high voltage lines (400kv), a phenomenon known as "induced atmospheric variation"'.
REN claimed that, 'due to the complexity of the phenomenon and the need to rebalance electricity flows internationally, it is estimated that full normalisation of the network could take up to a week.'
Spain's operator said earlier today that restoring power could take between six and ten hours.
People buy goods at a supermarket due to the blackout, in Lisbon, Portugal
Petrol stations are said to have closed across Spain amid the ongoing outages.
Photos from the village of Villabona showed a station closed off to the public during Monday's blackout.
One reader currently travelling in their motorhome through the Costa Blanca told MailOnline 'all the petrol stations [were] closed' when they went to fill up in Torrevieja, south of Alicante.
The Associated Press reported that 'gas stations stopped working' in Portugal as hospitals and other emergency services switched to generators.
A closed petrol station in Villabona on April 28, 2025, during a massive power cut affecting the entire Iberian peninsula and the south of France.
14:09
Ryanair monitoring 'potential disruption' to flights
Popular airline Ryanair is monitoring 'potential disruption' to flights to and from Spain and Portugal today, amid the ongoing blackouts.
'Due to a general power outage affecting mainland Spain and Portugal today, Monday, April 28, we are monitoring the potential disruption of flights operating to/from all airports in mainland Spain and Portugal,' the latest update said.
'We sincerely apologize for any inconvenience caused as a result of this power outage, which is beyond our control.'
14:06
Panic across Spain as ATMs and transport are knocked offline
Panicked customers scrambled to withdraw cash from banks and streets overflowed with crowds trying in vain to get a signal as a Spain-wide power outage plunged the country into chaos on Monday.
Carlos Condori, one of millions of people affected in Spain and Portugal, was travelling on the Madrid metro when the blackout brought his journey to a shuddering halt.
'The light went out and the carriage stopped," but the train managed to crawl into the platform, the 19-year-old construction sector worker told the AFP news agency outside a metro station in central Madrid.
'People were stunned, because this had never happened in Spain,' he added. 'There's no (phone) coverage, I can't call my family, my parents, nothing: I can't even go to work.'
At Cibeles Square, one of the Spanish capital's busiest thoroughfares, the blackout of traffic lights unleashed a cacophony of sirens, whistles and car horns as police tried to control the pile-up of traffic.
Bewildered office workers congregated in streets with their computers made useless without internet, alongside residents were thankful they had not been trapped in lifts.
A disorientated Marina Sierra was trying to contact her dad and improvise a route home to the Madrid suburbs after her school was shut.
'The building we were in was giving off smoke, they had to evacuate us quickly.... I'm shocked because everything is totally out of control,' the 16-year-old student said.
Transport chaos also gripped Spain's second city Barcelona, where locals and tourists alike flooded the streets in a desperate attempt to find out what had happened.
Student Laia Montserrat, who lives one hour outside Barcelona, was in the middle of a presentation when the blackout struck her school and left her in a predicament.
'As the internet wasn't coming back, they told us to go home... (but) there weren't trains either,' Laia told AFP. 'Now we don't know what to do.'
13:55
Ukraine 'ready' to come to Spain's aid
By james reynolds
Ukraine said it was ready to assist in restoring energy networks after blackouts hit Spain and Portugal.
Ukrainian Energy Minister German Galuschenko said on Monday the wartorn nation was in a position to help its European partners, still facing up to 9 hours offline.
'We are ready to share the knowledge and experience, including those gained during the systematic Russian attacks on the energy infrastructure,' Galuschenko said in a post on X.
Spanish electricity transmission operator Red Eléctrica said the cause of the outage was not immediately known.
13:32
Fire in France did not cause wider outage: grid operator
By james reynolds
France's high-voltage grid operator denied reports that a fire in the south of France had caused today's widespread outages across Europe.
A fire was reported to have occurred on the Alaric mountain, near Narbonne, damaging a high-voltage power line.
European channels suggested this had been identified as a 'possible cause'.
RTE said there was 'no impact on the supply-demand balance' in France.
According to RTE, the Iberian grid was automatically disconnected from the European grid from 12:38 pm to 1:30 pm (1038 GMT to 1130 GMT).
Operators on the continent are still working to establish the cause.
'A cyber attack has not been ruled out and investigations are ongoing,' one Spanish official said earlier this afternoon.
The head of operations for Spain's grid operator Red Electrica said 'we cannot speculate right now on the causes' of the countrywide blackout, however.
The president of Madrid’s regional government has asked the Spanish government to pave the way for troops to be deployed to help uphold order if required.
Isabel Díaz Ayuso called on the government to 'activate Plan 3 so that the Army can maintain order if necessary'.
The Level 3 emergency plan, covering 'national interest' emergencies, provides special powers for the central government to take control of major issues beyond the scope of Spain's autonomous provinces.
A view of urban chaos as a widespread power outage strikes Spain and Portugal around midday Monday while the causes are still unknown in Madrid, Spain on April 28, 2025
13:18
Portuguese outages appear to have been caused by external problems, official says
Portugal's government said the outage appeared to stem from problems outside the country, an official told national news agency Lusa.
'It looks like it was a problem with the distribution network, apparently in Spain. It's still being ascertained,' Cabinet Minister Leitão Amaro was quoted as saying.
Portuguese distributor E-Redes said the outage was due to 'a problem with the European electricity system,' according to Portuguese newspaper Expresso.
The company said it was compelled to cut power in specific areas to stabilise the network, according to Expresso.
The Portuguese Cabinet convened an emergency meeting at the prime minister's residence, and Spanish Prime Minister Pedro Sánchez visited power distributor Red Eléctrica to follow efforts at restoring grid operations.
Power has been restored in southwestern France, French high-voltage grid operator RTE said, adding it remained unclear what caused the outage.
'An electrical incident is currently affecting Spain and Portugal, the cause of which remains to be determined,' RTE said.
'In France, homes were without power for several minutes in the Basque Country. All power has since been restored.'
Red Eléctrica warned meanwhile that it could take hours for full functionality to resume in Spain.
Eduardo Prieto, director of services for Red Eléctrica's operations, said at 2:47pm local time the outage was 'totally extraordinary' and would take six to ten hours to repair, per El Pais.
13:01
PICTURED: Spain at a standstill amid ongoing outages
A British expat living in Barcelona says that 'nobody seems to know what's going on' in Spain 'because nobody has signal'.
The English teacher, who spoke to MailOnline on condition of anonymity, said it took 'about an hour to an hour and a half for people to realise' what was happening.
'I can get signal on my rooftop, but I can't get signal down below. One floor down I have nothing,' he said.
'Some of the traffic lights are still working ... The underground is not working apparently. Lots of parts of the public transport are not working.'
The 32-year-old said that 'lots of sirens' could be heard in the streets as the roads fell into chaos.
He added that the power went offline in Barcelona at 12:34pm local time.
12:27
Spain has not ruled out cyber attack, official warns
The Spanish government said this afternoon it was allocating all resources to resolving the power crisis, after major cities were knocked offline by blackouts.
It said it was still working to establish the cause of the outages.
The government has convened a crisis meeting at the offices of Red Electrica, El Pais reports.
Spain's traffic authority, DGT, meanwhile implored citizens not to use their cars unless absolutely necessary.
A view of a bar after a blackout hit Spain in the city of Toledo, central Spain, 28 April 2025.
A view of Madrid as a widespread power outage struck around midday Monday, with the causes still unknown, in Madrid, Spain on April 28, 2025
12:05
Parts of France briefly lost power - after fire damaged power line
Officials in Portugal have warned that outages are affecting the country nationwide.
Portugal's REN operator said all the Iberian peninsula was affected, as well as part of France.
Passengers have been stranded in the metro in Lisbon, waiting for the grid to restore power.
Some trains are still stuck in the tunnels between stations, Euronews Portugal reports.
People have been asked not to dial 112, the European emergency number for contacting police, ambulance, and fire services, unless in a genuine emergency to avoid overloading lines.
11:53
Chaos as blackout knocks traffic lights offline in Madrid
By james reynolds
Traffic lights in Madrid have stopped working, posing risk on major carriageways.
Footage showed chaos in the capital, with cars in gridlock on Monday as authorities rushed to restore power.
First pictures show Metro stations in Europe in darkness amid the wide power outage.
Rail above ground is also understood to have been affected.
Spanish railway company Renfe said that all trains have halted and no departures are currently taking place, with a power outage occurring at a 'national level'.
11:43
European nations hit by huge power outage
By james reynolds
Hello and welcome to MailOnline's live coverage of the power outage sweeping Europe.
Spain, France and Portugal were the first reported to have been hit by an outage on Monday.
The cause of the blackout is as yet unknown, and Spain's national grid is working to restore power.
E-Redes, a Spanish electricity grid monitoring company, said in a statement it was working on reestablishing connection in phases.
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