A widespread power failure across Spain and Portugal left millions without electricity and disrupted essential services before supplies were fully restored, according to BBC reporting. The cause remained under investigation, with officials in both countries promising reviews of the incident and measures intended to prevent a repeat.
The blackout affected transport networks, schools and hospitals across the Iberian Peninsula. Rail passengers were stranded, while hundreds of flights departing airports in Spain and Portugal were cancelled during the disruption and its aftermath. Although services began returning, some regional trains remained suspended or delayed after power came back.
Spanish grid operator Red Eléctrica and the Portuguese government said a cyberattack had been ruled out. The available account described two disconnection events on the electricity grids, with the second leading to the mass outage, and said there was no indication of human error. Officials had not established a definitive explanation, and Spanish Prime Minister Pedro Sánchez said the government would consider all hypotheses.
Spain set up an investigative commission led by its Ministry of Ecological Transition. The commission was due to work with the Spanish National Cybersecurity Institute, the National Cryptology Centre and the National Competition Market Commission. A separate Spanish High Court inquiry was also announced to determine whether a cyberattack could have been involved, even as the grid operator said it had excluded that explanation.
Portugal sought outside scrutiny. Prime Minister Luis Montenegro said his government had asked the European Union Agency for the Cooperation of Energy Regulators to conduct an independent audit. The European Commission also said it would carry out a thorough investigation and offered support to Spain and Portugal.
Transport recovery was uneven. Madrid's rail and metro operations returned to full service, while metro systems in Barcelona, Valencia and Bilbao resumed normal operation. Spain's airport operator Aena said its airports had remained operational through contingency power systems, despite flight cancellations across the region.
The outage also imposed immediate costs on small businesses. Traders at Madrid's Mercado de la Cebada faced losses as refrigeration failed and perishable goods warmed. The incident showed how a grid failure can quickly spread beyond household electricity into mobility, health services, education and local commerce.
With power restored, attention shifted from emergency response to the resilience of the interconnected Iberian system. Sánchez said all necessary measures would be taken to avoid another outage, but the investigations had yet to supply the central answer: what initiated the sequence of grid disconnections. Restoring supply resolved the immediate emergency, but the scale of the disruption ensured that both grid operations and contingency planning would face close examination.
