Red Eléctrica, Spain’s electricity grid operator, ruled out a cyberattack, human error or unusual weather. Experts say it could take weeks to determine the cause.

The blackout that engulfed the Iberian Peninsula on Monday was chaotic and stressful for many. But it had a silver lining: People were forced away from their screens and into the “real” world, connecting with the present and one another.

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