A massive power outage on Monday left millions without electricity across Spain, Portugal, and parts of France, causing widespread disruption. An incident involving a power interconnector between France and Spain was identified as a key factor, though experts believe other issues contributed. The outage began around midday, disrupting transport, shutting down businesses, and leaving people trapped in elevators. Emergency services were stretched as Madrid residents were urged to stay off roads. By evening, power was partially restored—50% in Spain and to 750,000 customers in Portugal. Authorities continue investigating the cause, with no signs of a cyberattack reported.