Spain's grid operator, Red Eléctrica, has warned of potential blackouts due to voltage variations detected over the past two weeks, following a significant outage in April that affected 60 million people. The company has linked these fluctuations to changes in renewable energy generation and has requested urgent technical modifications to stabilize the grid. Residents are advised to prepare emergency kits in case of another blackout. Teljes cikk (Euronews.com)