Climate

Extreme heat and drought are putting nuclear power stations in Hungary and Romania on the Danube at risk

The Danube’s critically low water levels are threatening the operation of nuclear power stations, with military intervention and production cuts being implemented to prevent power cuts.

FOTO D'ARCHIVIO: La centrale nucleare di Paks con il letto del Danubio parzialmente prosciugato a Dunaszentbenedek, Ungheria, 31 luglio 2026. REUTERS/Bernadett Szabo/Foto d'archivio Reuters

2' min read

Translated by AI
Versione italiana

2' min read

Translated by AI
Versione italiana

Hungary’s only nuclear power station, Paks, was on the verge of a complete shutdown overnight due to a critical drop in the water level of the River Danube caused by the extreme heat. By the morning, however, the water level had risen again, allowing the plant’s last turbine to continue operating safely, Hungarian Prime Minister Peter Magyar said today.

“At 1.30 am, we were just a few millimetres away from a complete shutdown of the Paks power station, but the water level stopped falling and, by the morning, had risen by 1.5 centimetres. The last turbine is currently operating safely,” Magyar wrote on X.

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L’esplosione

La Marina rumena fa saltare in aria alcuni massi con esplosioni controllate sul canale di Bala per deviare il flusso delle acque del Danubio verso la centrale nucleare di Cernavoda, a Izvoarele, in Romania, il 3 agosto 2026. Foto Inquam/George Calin via REUTERS ATTENZIONE REDATTORI

Romania diverts the course of the Danube to save a nuclear power station

The Romanian army has taken unprecedented measures to increase the flow of water to the country’s only nuclear power station, by blasting a rock formation in the Danube on 3 July 2026.

The Black Sea country has already shut down one of its two reactors at the Cernavoda power station because low water levels in the Danube caused by the drought are preventing the equipment from being cooled adequately.

Romania, esplosivi nel Danubio per contrastare la siccità

The drop in energy production has prompted the government to ask businesses and the public to reduce their consumption: the country’s two largest car manufacturers, Dacia and Ford Otosan, part of Renault SA, have already suspended production until the end of August, said acting Prime Minister Ilie Bolojan.

The army used 180 kilograms of explosives in a controlled blast to remove a rock that was narrowing a branch of the river, acting Defence Minister Radu Miruta told reporters. The aim was to redirect the water into the main channel feeding the plant to prevent the remaining reactor from shutting down after Thursday.

The procedure also involves sinking four barges filled with rocks and other material by Wednesday, to create an artificial barrier and divert water towards Cernavoda.

“We are very close to reaching the minimum water levels required to ensure the safe cooling of the nuclear equipment, and we are doing everything we can to increase the flow of water to the nuclear power station,” said Miruta.

Romania has declared a state of alert in the energy sector for the whole of August, as energy production is falling sharply due to the drought and record-low water levels in the Danube. The country, which relies on a mix of energy sources including solar, wind and nuclear power, is currently importing around 2,000 megawatts a day to meet its demand, particularly during peak hours when costs are higher, according to Bolojan.

Further upstream, in neighbouring Hungary, Prime Minister Peter Magyar told reporters that water levels were sufficient to keep one of the four reactors running at half power for at least another day at the country’s only nuclear power station.

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Over the weekend, the government was preparing to shut down the 2,000-megawatt power station by Monday, but later stated that the forecasts for water levels had become slightly more optimistic, although the situation remains tense.

“The next five days will be the most critical,” he said, with temperatures expected to peak at 42°C during the week.

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