Dwindling Danube Levels Force Nuclear Power Cuts Across Romania and Hungary

Record-low water levels on the Danube are forcing emergency interventions in Romania and Hungary as both countries struggle to keep nuclear power generation running amid a cooling-water shortfall.

Officials in Romania carried out a controlled explosion in the Danube to redirect water flow toward the Cernavodă nuclear plant. The step followed a nationwide state of emergency declared in response to exceptionally low river levels that have sharply limited the country’s ability to produce nuclear electricity.

Emergency actions to protect nuclear cooling

Romania redirects water toward Cernavodă

Romania’s intervention was described as a targeted effort to guide more river water toward the plant’s intake area. Authorities have linked the action directly to constraints on nuclear output caused by insufficient cooling water.

The emergency declaration indicates the issue is not confined to a single site, but reflects a broader national impact from low river flows. With nuclear generation curtailed, Romania is increasingly leaning on electricity imports to cover the gap, officials said.

Hungary’s Paks plant faces deeper cuts

Output drops below 50% with shutdown risk

In Hungary, the Paks nuclear facility is operating at under 50% capacity because of the same cooling-water stress. Officials warned the plant could face a complete shutdown by next week if conditions do not improve.

With domestic generation constrained, Hungary is also becoming more reliant on imported electricity, which officials described as expensive under current conditions. The combination of reduced output and higher import dependence is tightening supply options across the region.

Wider regional strain as hydro output falls

Serbia’s key hydropower plants at 20%

Regional energy stability is being further weakened by reduced hydroelectric generation in Serbia. Key plants there are operating at about 20% capacity, according to officials, amplifying cross-border pressure on available power supplies.

Meteorological forecasts cited by authorities point to no meaningful rainfall, suggesting the cooling-water constraints and emergency measures could persist for several weeks. That outlook reduces near-term flexibility for both nuclear and hydro generation that depend on river conditions.

Demand management steps to protect the grid

Voluntary reductions and industrial cuts

Governments are responding with voluntary power-reduction measures and cuts to industrial electricity consumption aimed at maintaining grid stability. These steps are being used alongside imports to balance supply and demand while domestic generation remains constrained.

The episode underscores a shared infrastructure vulnerability: critical power assets that depend on river-based cooling systems can face abrupt operational limits during prolonged drought. With limited rainfall expected, officials indicated that import reliance and consumption-management measures are likely to remain central tools for maintaining system stability in the coming weeks.