On April 28, 2025, over 10 million people across Spain, Portugal, and parts of France experienced a sudden and widespread power loss. BRUSSELS, 24 FEBRUARY 2025 – The final report on the grid incident of 21 June 2024 in the Western Balkan-Region highlights the value of international cooperation by the TSOs and RCCs It presents the gathered facts and the analysis of the causes of the incident in the Balkan region. The report also. The following Technical Report, concerning the system event which occurred on 21 June 2024 in the South-East Europe Synchronous Area, has been prepared and issued by the Incident Classification Scale Investigation Expert Panel and is based on information as known on 20 February 2025. Today, ENTSO-E, ACER and the regulators in the region convened in the first meeting of this Expert Panel. A rare atmospheric anomaly destabilized more than 2,000 kilometers of high-voltage transmission lines, leading to a cascading grid failure—crippling regional. Power outages were reported across large parts of Spain, Portugal, Andorra, and Southern France on April 28, 2025. Impacts: Business, transport, and communications disruptions. One should likely expect increased security in affected areas. This is considered the most serious blackout in Europe in recent years, and it is a profound warning to us that the vulnerability of modern energy.