Flights grounded, tennis matches suspended, millions in the dark: How power outage affected Spain and Portugal

Millions of people in Spain and Portugal were left struggling after a power outage left much of both countries as well as parts of southern France in darkness. Trains were halted, phones services down, ATM machines went offline and traffic lights were out across both countries. While some parts of Spain have seen power restored, Portugal’s power operator has said it could take up to a week to restore power completely across the country. But what happened? What do we know?

Explainers