Record-low water levels in the Danube River have forced Hungary's Paks nuclear power plant and other regional reactors to shut down.
The crisis threatens the energy stability of Central Europe because the Paks plant generates nearly 50% [1] of Hungary's total electricity. Without sufficient cooling water from the river, the reactors cannot operate safely, leaving the national grid vulnerable during a period of intense heat.
A severe heatwave in late July 2024 led to the record-low [2] water levels that triggered the shutdowns. The lack of available cooling water affected not only the Hungarian facility but also nuclear reactors in Romania, Serbia, and Bulgaria [3].
Government officials said the plant could remain shut for weeks [4] if water levels do not recover. The situation has escalated into a broader power crisis for Hungary and Romania as they struggle to maintain electricity supplies while facing peak summer demand.
Nuclear plants rely on large volumes of water to cool their reactors and condense steam. When river levels drop too low or water temperatures rise too high, the plants must reduce power or shut down entirely to prevent overheating. The Danube serves as the primary cooling source for several of the region's most critical energy assets [3].
Local authorities are monitoring the river's flow closely. The impact on the regional grid is significant, as the loss of these baseload power sources forces countries to rely on more expensive or less stable energy imports to avoid widespread blackouts.
“The Paks plant generates nearly 50% of Hungary's total electricity.”
This event highlights the vulnerability of nuclear energy infrastructure to climate-driven water scarcity. As heatwaves increase in frequency and intensity, the reliance on river-based cooling systems creates a systemic risk where the highest demand for electricity—during extreme heat—coincides with the lowest capacity to generate it.
