Tens of millions of people on the Iberian Peninsula had their Mondays upended by power outages that lasted hours. Across Spain and Portugal, hospitals ran on generators, trains we

On Monday morning, millions of people across the Iberian Peninsula lost power. The cause of the outage is yet to be determined.

Several airports, including Madrid airport, which is Spain's busiest, had no electricity, El Mundo reported. Major cities including Barcelona, Seville and Valencia were without power. Parts of France were also affected by power loss.