Danube water level extreme low at Paks. “Because of the severity of this unprecedented situation, we are asking everyone — including large consumers and the public — to act responsibly. Record-low water level in Budapest. Depending on the water level, the units could be brought back online within a few days, the company said. Hungary’s Paks nuclear power plant will be shut down completely as water levels on the Danube, used to cool the NPP, fall, and the gas-fired Dunamenti Power Plant is malfunctioning.