Spain’s electricity grid operator, Red Eléctrica, has issued a warning about potential nationwide power outages following the detection of “abrupt voltage variations” across the country over the past two weeks.
The alert follows a major blackout in April that left around 60 million people in Spain and Portugal without electricity for over ten hours.
The European Network of Transmission System Operators for Electricity (ENTSO-E) later confirmed that the outage was triggered by grid overvoltage, which occurred as the system failed to stabilize after a sudden power loss.
According to Red Eléctrica, the recent fluctuations could jeopardize power supply stability if technical adjustments are not implemented.
The company has requested temporary approval of new operational procedures covering scheduling, technical restrictions and voltage control. These measures would initially last 30 days, with a possible 15-day extension.
Authorities are urging citizens to be prepared in case of another large-scale outage.
Experts recommend households keep a basic emergency kit, including bottled water, non-perishable food, flashlights, a first aid kit, batteries and external chargers.
The EU’s earlier call for 72-hour preparedness kits, made before April’s blackout, is once again being cited as an example of smart crisis planning.
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