Electricity is pulsing through Spain and Portugal again after a massive outage knocked out power in both countries on Monday. So too are questions.

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,