A significant power outage has disrupted large areas of Portugal and Spain, affecting public transport, internet services, and ATMs for approximately 50 million residents. Major cities, including Madrid and Lisbon, experienced blackouts, with the Portuguese grid operator indicating that full restoration could take up to a week. The outage is believed to stem from a fault in the Spanish electricity grid, linked to “anomalous oscillations” due to extreme temperature variations, although no official cause has been confirmed yet.