Airport are urging passengers to monitor local travel advice and flight trackers for updates.

A sweeping power outage brought Spain and Portugal to a standstill Monday, halting trains and causing major disruption at airports.

At midnight, Spanish Prime Minister Pedro Sanchez declared a state of emergency, which is still in place today.

Electricity was restored in more areas overnight with Red Eléctrica, a partly state-owned body that operates Spain's national grid, reporting that 99.16 per cent of power had been returned to the country this morning. Portugal has now fully recovered from the blackout, according to the government.

Though power has now been restored in many places, the lingering effects of the outage are still having some impact on travel in both Spain and Portugal. Here’s what travellers need to know about train services and flight operations in Spain and Portugal today.

"Tonight, airports have adjusted their schedules to the needs of rescheduled passengers, and there have been no significant crowds in the terminals."

Enaire, Spain's air navigation manager, has said that air traffic control has returned to normal this morning at the three control centres affected by the power outage: Madrid, Barcelona and Seville.

Despite this, many flights from Madrid, Barcelona and Seville are cancelled or delayed this morning as services return to normal. Enaire is advising passengers to check the status of their flight with their airline before they travel to the airport.

In Portugal, the government has announced that all airports are now operating, although some recovery efforts are still underway in Lisbon.

A number of arrivals and departures from Lisbon airport have been cancelled this morning, and most are operating with delays. The airport operator is advising passengers to contact their airline before heading to the airport.

What are my rights if my flight was cancelled or delayed?
In total, there were 413 cancellations to and from Spain and 372 to and from Portugal yesterday, according to aviation analysts Cirium. But many of these were flights between the two countries, meaning they were double-counted in this total.

It is thought that around 500 flights across the two countries were scrapped on Monday due to the outage.

Lisbon was worst affected with 45 per cent of departures grounded. Seville saw a third of departures cancelled, while Madrid and Barcelona each had around 50 departing flights cancelled.

If you were affected by the disruption, you may be entitled to compensation as part of the ‘Denied Boarding Regulations’, according to Ernesto Suarez, CEO of travel insurance company Gigasure.

Depending on your circumstances, you may receive some money for alternative travel arrangements, food, and accommodation if necessary.

"As the disruption has been caused by circumstances outside of the airline's control, passengers may not get any compensation directly from the operator," Suarez says.

"Those with travel insurance may have some financial protection if all, or part of, their trip is delayed, cancelled, or cut short due to the power outage. If the customer bought extended travel disruption cover, they may be covered for travel delay, abandoning or cutting short their trip and/or additional costs if they have to move accommodation or extend their stay." 

If passengers have already travelled and cannot return due to the power outages, many travel insurance policies will continue to provide cover until you can return at no additional charge, Suarez adds.

If you have extended travel disruption cover, you may also be entitled to compensation that covers any additional travel and accommodation costs until you can return, subject to your policy terms, conditions and exclusions.

EasyJet offers stranded passengers free-of-charge transfers
EasyJet released a statement yesterday saying that the blackout was 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," the airline said. "Our flying programme at Porto and Faro airports is operating as planned."

The airline urged passengers to monitor local travel advice and flight trackers for updates.

They also say passengers in Spain or Portugal who are unable to travel are being provided with free-of-charge transfers within 72 hours or a flight voucher, according to the BBC.

Train networks in Spain and Portugal are slowly returning to normal
Train services in both countries were thrown into chaos yesterday, with the power outage still impacting rail services today.