An abrupt loss of power generation at a substation in Granada, followed by failures seconds later in Badajoz and Seville, triggered an unprecedented blackout across Spain and Portugal on April 28, Spain's energy minister said on Wednesday.

Spain's energy minister, Sara Aagesen, has disclosed that an abrupt loss of power generation at the country's Granada substation, followed by failures at Badajoz and Seville, was the cause of the blackout across Spain and Portugal on 28 April 2025,

The loss of 2.2 gigawatts of power at substations in Granada, Badajoz, and Seville led to the April blackout in Spain, Vice Prime Minister Sara Aagesen informed parliament on Wednesday. She also ruled out a cyberattack as the cause of the issues.