BARCELONA, Spain (AP) — A blackout brought much of Spain and Portugal to a standstill Monday, halting subway and railway trains, cutting phone service and shutting down traffic lights and ATM machines for the 50 million people who live across the Iberian Peninsula.

A massive power outage hit Spain and Portugal on Monday, shutting down trains, disrupting air travel and leaving large parts of the countries — including the capital cities of Madrid and Lisbon — in the dark.