The sweeping power outage that hit Spain and Portugal this week has raised questions about the electricity grid in a region not normally known for blackouts. Monday's outage, one of the worst ever in Europe,

Spain's national grid operator Red Eléctrica de España has ruled out a cyberattack and pointed to a drop in solar generation as the preliminary cause of the country's power outage, El Pais reports.

THE lights are on and the bars are open as Spain and Portugal celebrate the return of electricity following a mass blackout. Electricity had been restored to nearly 90% of mainland Spain by early