Overview

• A peninsula-wide blackout on April 28 left Spain and Portugal without power for over eight hours, disrupting millions of lives and services.
• The blackout was triggered by two rapid power-flow oscillations in southwestern Spain that overwhelmed the grid's automatic safeguards and cascaded across the system.
• Spain and Portugal have formed a high-level monitoring group, led by their energy ministers, to investigate the incident and share findings with European authorities.
• Red Eléctrica Española has provided all requested data to the government commission, but the exact cause of the oscillations remains undetermined, with no evidence yet of a cyberattack.
• The crisis has intensified political debates, with opposition parties questioning the government's renewable energy strategy, while officials pledge transparency and systemic improvements.