A video captured residents cheer and clap as power was restored to a neighborhood in Madrid following a 9-hour outage in most of Spain and Portugal. "The lights returning in the Pilar neighborhood is celebrated more than a goal from Iniesta,

The Madrid Open will resume play this morning after the tennis tournament was hit by the vast power outage across Spain and Portugal on Monday.

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.