A widespread power outage hit Spain and Portugal, affecting millions of people who live across Europe's Iberian Peninsula.

Officials in Spain and Portugal are racing to restore electricity after a huge power outage that grounded flights, paralyzed metro systems, disrupted mobile communications and shut down ATMs, upending the lives of tens of millions of people and turning airports and train stations into campgrounds for stranded travelers.

A massive power outage paralyzed much of Spain and Portugal, grounding flights, halting public transport, and disrupting hospitals, before power was gradually restored. The cause remains unclear, with Spain and Portugal blaming faults in their electricity grid connections.