Hungary moved toward a complete stoppage of electricity generation at its Paks nuclear station on July 30, 2026 after the Danube fell so low that the plant’s cooling-water intake could no longer operate normally, according to the supplied BBC and DW reports.
The event was notable not only because Paks is Hungary’s only nuclear plant, but because Prime Minister Peter Magyar said it would be the first full shutdown there in 44 years. DW reported that reactor 2 had already been cut by half on Thursday morning, while earlier reductions had affected other units. Together, the four Russian-built reactors provide about 2 gigawatts of capacity, meaning the problem quickly became a national energy-security issue rather than a routine technical adjustment.
Both reports connect the disruption to a wider regional drought and heatwave. The BBC said temperatures in Hungary were expected to hover around 37C for about a week. DW described the Danube as having fallen to historically low levels and said the gauge in Budapest had dropped to 23 centimeters, below the prior 2018 record of 33 centimeters. In Romania, where one of two reactors at Cernavoda had already been shut, authorities were also trying to avoid losing the second unit.
The stress on power infrastructure came alongside broader transport and economic strain on the river system. The Danube is vital not only for cooling some power plants but also for cargo shipping and tourism. DW said cruise ships in Hungary were docking farther upstream while cargo movements had nearly stopped, and it described parts of the river in Romania as already about one meter below the navigable minimum. The BBC added that emergency evacuations had been needed after a cruise vessel ran aground near Vidin in Bulgaria.
Magyar urged Hungarians to curb electricity use during evening peak hours, including delaying electric-vehicle charging and limiting air-conditioning use. The BBC said he also warned that rotating service cuts remained possible if voluntary restraint and other measures failed to keep the grid balanced. That warning shows how quickly an environmental shock can spill into household and industrial energy risk.
The reporting does not establish how long the outage would last, but it does show that water scarcity had become severe enough to interrupt core baseload generation in more than one Danube country at the same time. It also places the episode in a broader European pattern of heat, wildfire danger and stressed waterways.
On the event date, the Paks shutdown was therefore more than a local plant story. It was a demonstration of how prolonged heat and depleted rivers can directly constrain nuclear operations, transport networks and national power planning across the region.
