Full Breakdown
Danube Drought Triggers Nuclear-Plant Crises in Romania and Hungary
8/4/2026, 8:28:28 AM
Background & Context
A prolonged heat wave has driven the Danube River to record-low levels across Central and Eastern Europe. In Budapest the river fell to about 10 cm (4 in), well below the previous low of 33 cm (13 in) set in 2018. In Romania flow is roughly one-third of its seasonal average, and the Iron Gate hydroelectric plant in Serbia is operating at about 20 % of capacity. The Danube supplies cooling water to the sole nuclear reactors in Romania (Cernavoda) and Hungary (Paks), making the low water a direct threat to electricity generation.
Core Event
On August 3, Romanian naval forces detonated a rock outcrop in the Danube’s Bala Canal with 180 kg of explosives, clearing a channel to divert more water toward the Cernavoda plant’s remaining reactor. The reactor supplies roughly 20 % of Romania’s electricity, while the river’s flow remains at about 1,500 m³ s?¹—less than a third of the July average.
Hungary’s Paks plant, normally providing about 40 % of national electricity, has been forced to run at roughly 10 % of capacity. On the day of the Romanian blast the plant produced only 240 MW, compared with its typical 2,000 MW output. Prime Minister Péter Magyar announced that the last turbine could continue operating for a short period, averting a full shutdown.
Official Statements & Responses
Romanian Defence Minister Radu Miruta called the explosion a success and warned that further failure to divert water could force a complete shutdown of Cernavoda by Thursday. Acting Prime Minister Ilie Bolojan declared a national state of alert in the energy sector and announced a decree allowing mandatory cuts for large industrial consumers. Magyar thanked households and businesses for the 700 MW reduction in demand, which he said kept the plant operating at reduced capacity.
German Transport Minister Steffen Bilger described the broader Danube crisis as “very tense” for inland freight transport.
On-the-Ground Reports
The Romanian blast created a water column that rose several meters, according to eyewitness video. Military sappers and divers conducted a second blast after the first attempt failed to fracture the rock. Debris is being moved by barges to a strategic location where it will be sunk to raise the river’s level.
In Hungary, engineers kept the final turbine running, preventing an immediate shutdown. Freight trains powered by electricity were barred from operating during peak hours to conserve 70–90 MWh per day.
Conflicting Reports & Gaps
Sources differ on the exact water level measured in Budapest: one report cites 23 cm (9 in) on a Wednesday morning, another states about 10 cm (4 in) on Monday. Both describe the measurement as a record low but provide different figures. No definitive forecast is offered for when the Danube will rise, and no significant rain is expected in the coming days.
What’s Next
Romanian authorities plan to finish the temporary dam and water-diversion work by Wednesday. Hungary will decide on Sunday whether to impose mandatory electricity restrictions on large companies starting Monday. Both countries remain dependent on costly electricity imports and renewable sources to bridge the shortfall while the drought persists.
