Full Breakdown
Record-Low Danube Levels Spark Energy Emergency in Hungary and Romania
8/8/2026, 10:14:09 PM
The crisis unfolds
Severe drought across Central and Eastern Europe has driven the Danube to historic lows. In Hungary, the river fell to within a few centimetres of the level that triggers an automatic shutdown of the Paks nuclear plant, leaving only one of its four reactors operating at roughly 10 % capacity. In Romania, flow dropped to about 1,400 m³/s—roughly one-third of the typical August average—forcing the shutdown of one reactor at Cernavoda and threatening the remaining unit. Together, the two reactors supply about 40 % of Hungary’s and 20 % of Romania’s electricity.
Background & context
The drought follows a summer of record-breaking heatwaves described as “the tip of the iceberg” of climate-driven hydrological extremes. Since 2018, the Danube has seen recurring low-water events, but the 2026 levels are the deepest recorded in decades, exposing riverbanks, sandbars and long-submerged wartime wrecks.
Data & statistics
- Danube flow in Romania: ? 1,400 m³/s (? 1/3 of normal August flow).
- Paks plant output: ? 240 MW (? 10 % of its 2 GW capacity).
- Expected extension of Cernavoda’s second reactor operation if emergency measures succeed: 9–10 days instead of 5–6 days, according to plant director Romeo Urjan.
- Voluntary power-saving cuts in Hungary: 600–700 MW per day during peak evening hours, equivalent to switching off about 1 million air-conditioners.
Official statements & responses
Romanian acting Prime Minister Ilie Bolojan announced a nationwide energy alert on July 31 and urged households and businesses to limit electricity use between 7 p.m. and 11 p.m., while pledging no industrial cuts for the next 5–7 days if the remaining reactor stays online.
Hungarian Prime Minister Péter Magyar thanked participants for voluntary reductions and warned that “the heatwave will peak today and tomorrow … so cutbacks will be especially important between 5 p.m. and 10 p.m.” He ordered the dimming of decorative lighting on Budapest’s parliament, Buda Castle and Chain Bridge to ease grid pressure.
Cernavoda plant director Romeo Urjan said sinking four rock-filled barges could extend the second reactor’s operation to 9–10 days; without them, shutdown is expected within 5–6 days.
On-the-ground reports
Residents along the Danube in Budapest observed exposed sandbanks and built cairns to mark the low water line. In Serbia’s Prahovo port, World War II German warships surfaced, halting commercial traffic. In Bulgaria’s Ryahovo village, locals uncovered a woolly mammoth jaw and tusks, prompting scientists to note the river’s sedimentary deposits can act as a “storage bank” for ancient remains.
Conflicting reports & gaps
Estimates of how many days the Cernavoda reactor can remain operational range from 5–6 days (Urjan) to 9–10 days if the barges succeed, reflecting differing assumptions about water-diversion effectiveness. No public data yet confirm the actual increase in river level after the barges are submerged.
What’s next
Romanian authorities plan to sink the four rock-filled barges after a safety delay, with the operation expected to begin on Friday. Hungary will continue to monitor river levels and may reinstate decorative lighting if the Danube rises, though Magyar warned any rise is likely temporary. Both governments have signaled that further emergency measures—including staged industrial power cuts—remain on the table if water levels do not improve before the end of August.
