Europe's major rivers are experiencing unprecedented low water levels, creating significant disruptions to industrial transport and trade. Water levels at Kaub, a key chokepoint on the Rhine for shipments heading to southern Germany and Switzerland, have fallen to 25 centimeters, matching the low reached during a drought in 2018. A drop to 24 centimeters, forecast this week, would mark the lowest level since records began in 1880, according to German federal data compiled by ETH Zurich. The Rhine, Europe's busiest inland waterway, snakes for roughly 800 miles from the Swiss Alps to the North Sea, with the fourth heat wave this summer stretching through most of this week. As reported by Business Standard, this is disrupting the transport of chemicals, oil products and other goods while boosting freight costs. In 2018, low Rhine water levels cut German industrial production by as much as 1.5%, though many firms have since adapted their supply chains, with inland shipping's share of Germany's total freight transport dropping from 4.7% in 2017 to 4.1% in 2024.
France has experienced unprecedented nuclear power disruptions this summer, losing over 3.7 terawatt-hours of nuclear power to temperature restrictions during June and July alone, according to ICIS data. This represents more than double the previous full-summer record set in 2018. When temperatures peaked at over 40°C, French nuclear output was cut for several days by over 9 gigawatts for 12 reactors out of the 57 total, as reported by Kpler data. Many of France's nuclear plants rely on river water for cooling before discharging warmer water back into rivers, with environmental regulations limiting these discharges during high temperatures. The Bugey nuclear plant in eastern France, for instance, must reduce output if the temperature of the Rhone river crosses 26°C. As reported by Business Standard, Électricité de France CEO Bernard Fontana confirmed that the Chooz 1 reactor on the Meuse River will be halted from Saturday to comply with an intergovernmental agreement with Belgium requiring minimum river flow, while Chooz 2 has been offline since mid-July and one reactor at the Cattenom nuclear power station is also scheduled to shut from Saturday.
Europe's hydroelectric capacity faces even more severe challenges, with reservoirs in the Alps and Nordic region running dangerously low. According to Business Standard, Norway's reservoirs are filling up at about the lowest rate in the last 20 years, with Katinka Bogaard from Volt Power Analytics in Oslo attributing this to below-average snowfall last winter, an unusually warm spring and summer that melted limited snowpack, and persistently dry weather. Southern Norway has exported 3.8 TWh this year to Germany, England, Denmark and the Netherlands, as reported by Norwegian grid operator Statnett. Some stretches of the Danube, Europe's second-longest river, have already fallen to record lows, disrupting barge navigation in Romania and Slovakia. Hungary is fully shutting down its sole nuclear plant for the first time in its 44-year history on Sunday, posing a test for new Prime Minister Peter Magyar and stripping the country of 40% of its electricity generation capacity. Romania's energy sector will remain on a state of alert through August as power production slumps, with the country potentially forced to shut a second reactor at the Cernavoda plant as low water levels in the Danube impair cooling operations.
The combined disruptions are driving electricity prices higher across Europe, with France's heat-related outages coinciding with surging natural gas and coal prices after the collapse of the US-Iran ceasefire once again curtailed traffic through the Strait of Hormuz. On June 23, day-ahead prices reached a high of €210/MWh in Germany with contracts in France and Britain also reaching levels not recorded since January 2025, according to LSEG data. As reported by Business Standard, Matthew Jones from ICIS noted that France is pulling prices up in neighboring markets, with fears in the market that the situation could worsen as more heat waves are forecast for August. Christopher Kurish from power trading firm Mind Energy in Denmark warned that big hydro deficits in Norway will keep prices higher, regardless of Middle East developments, as reservoirs probably won't be filled enough come winter time. The river disruptions are also affecting industrial operations, with EnBW building up fuel stocks whenever coal-fired power plants are offline to ensure sufficient inventories, while higher costs threaten to further erode Europe's industrial competitiveness against rivals in Asia and North America.
The current crisis represents another sign of how climate change is taking its toll on the fastest-warming continent, with experts attributing the severity to human-induced warming. Dominik Schumacher from ETH Zurich noted that human-induced warming has made this drought more severe than it would otherwise have been, with the same rainfall deficit giving a worse drought again under further warming. As reported by Business Standard, David Hannah from the University of Birmingham explained that climate change intensifies droughts by raising baseline temperatures, making hot, dry periods more effective at drying out landscapes and reducing river flows. Temperatures across the mainland are forecast to be 2°C to 8°C warmer than normal through early August, according to Vaisala meteorologist Matthew Dross, with longer-term weather models supporting more rounds of high pressure that may mean little drought-busting rainfall until late-fall. The feedback loop has driven up plant water use, sapping moisture from soils that quickly soak up meager rainfall before it can flow into river basins, creating a cycle of persistent drought conditions.
