Europe’s nuclear power production is facing challenges due to unusually low water levels in the Danube River. The Paks nuclear power plant in Hungary, and others relying on river water for cooling, are particularly vulnerable. Reduced river depths hinder the plants’ ability to obtain sufficient cooling water, potentially forcing output reductions or even shutdowns. This situation highlights the reliance of nuclear energy on stable local environmental conditions, especially during extreme heatwaves. Authorities are monitoring the situation closely and exploring potential mitigation strategies, including water storage and alternative cooling sources. The current conditions underscore the broader risks climate change poses to critical energy infrastructure across the continent, potentially impacting energy security. Reduced output from nuclear plants could exacerbate existing energy concerns during peak demand.