At least five people have died since an unprecedented blackout brought much of Spain and Portugal to a standstill.
A married couple and their son were found dead yesterday at their home in Taboadela, a town of less than 1,500 in Galicia, northeast Spain.
The father, 81, who required a respirator, his wife, 77, and their disabled son, 56, are believed to have died of carbon monoxide poisoning after a domestic generator or a fuel appliance malfunctioned.
Prime Minister Pedro Sánchez said the European grid experienced a ‘strong oscillation’, but said the cause is still being determined.
He said at 12.22pm yesterday, the Spanish power grid lost 60% of its national demand in just five seconds.
‘We have never had a complete collapse of the system,’ he added.
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.
Dozens of flights were also cancelled, with passengers scrambling to know their rights.