Danube at record low: what the river's crisis means for health and energy

The Danube has fallen to its lowest recorded level in modern history, forcing the shutdown of Hungary's only nuclear power station and disrupting river freight from Germany to the Black Sea. Romania, Bulgaria and Serbia are grappling with the same combination of prolonged heatwaves and low rainfall that has left the river's basin in a state of hydrological drought not seen in decades.

The Paks nuclear plant, which supplies about a third of Hungary's electricity, was taken offline after cooling water intake fell below the minimum required for safe operation. The shutdown has pushed Hungarian wholesale electricity prices up sharply and raised questions about the resilience of baseload power generation in a warming climate.

The health dimension is less visible but arguably more consequential. The same heat that emptied the river has driven a surge in heat-related hospital admissions across the region, with elderly populations in Bratislava, Budapest and Belgrade disproportionately affected. Public health authorities have issued repeated heat warnings, but the infrastructure to respond — air-conditioned cooling centres, sufficient ambulance capacity, coordinated social care — remains uneven.

What happens next depends on whether the high-pressure system that has parked over central Europe for six weeks breaks down, and whether the region's governments treat this as a one-off event or the new normal. The answer will shape energy policy, public health budgeting and river management for a generation.