The Rhine and Danube rivers have dropped to alarmingly low levels, disrupting power generation, freight transport, and inland shipping across Europe. These two waterways are critical for cooling nuclear power plants, producing hydroelectricity, supplying industrial water, and facilitating commercial trade, and their prolonged low levels threaten to drive up energy and logistics costs. To combat this economically threatening drought, authorities have resorted to extreme measures, including riverbed blasting.
On July 30, 2026, near Neuss in western Germany, a persistent extreme heatwave caused the Rhine River to hit a record low water level. An aerial view showed an abandoned eel-fishing boat stranded in the dry mud. Europe is currently facing a severe drought that is impacting economic growth, forcing nations to take drastic steps like blasting riverbeds to deepen channels.
Where to begin
Extreme weather continues to plague Europe this summer. Romania recently shut down its only remaining operational nuclear reactor, which relies on Danube River water for cooling, for the first time. Authorities in Bucharest even deployed the navy to conduct underwater blasting operations to improve water flow. Images released on Monday show Romanian navy personnel performing controlled explosions to break up rocks on the riverbed near the village of Izvoarele, aiming to guide more water towards the cooling system of the Cernavodă Nuclear Power Plant.
The low water level of the Danube is also putting the Paks Nuclear Power Plant in Hungary at risk of shutdown. This plant supplies approximately 40% of Hungary's electricity. Meanwhile, Serbia has been forced to reduce its hydroelectric power generation.
How the Rhine's low water levels impact the German economy
The Rhine River flows through the heart of Europe's economic core and is a vital waterway. Its current water level has dropped to its lowest point in nearly 150 years, threatening the German economy and further disrupting global supply chains. According to official data compiled by ETH Zurich, the critical Kaub gauge, a key chokepoint for shipping to southern Germany and Switzerland, recorded a water level of just 24 centimeters on Monday and Tuesday, the lowest since records began in 1880. Forecasts indicate levels will continue to fall through the weekend. The minimum navigable depth for the Rhine at the Kaub gauge is 78 centimeters. While vessels can still travel below this threshold, cargo barges must significantly reduce their load, causing freight rates and low-water surcharges to skyrocket.
Liz Saccoccia, Water Security Lead at the World Resources Institute, stated via email, "Major rivers like the Rhine and Danube are core trade arteries and also provide water for industry and power generation. The negative impacts of persistently low water levels extend far beyond the shipping sector." On August 3, 2026, a controlled underwater blasting operation was conducted on the Danube riverbed near the village of Izvoarele. The goal was to deepen the channel and guide more water to the cooling system of the Cernavodă Nuclear Power Plant. With the river level dangerously low due to a prolonged heatwave, local authorities and plant engineers approved the blasting to ensure the reactor could continue operating safely.
"The negative effects are already visible. Nuclear power plants in Hungary, Romania, and France, as well as hydroelectric plants in Serbia, have been forced to reduce output due to insufficient water for cooling or turbine power. This raises the risk of blackouts and forces countries to import expensive electricity," Saccoccia added. "Along the Danube, low water prevents farmers from shipping out their produce and prevents cruise ships from docking at ports like Budapest. These cases are a preview of how declining water supply reliability will ripple through the economic chain, impacting trade, energy security, supply chains, and local industries."
What low water levels mean for freight and supply chains
This crisis underscores a major environmental challenge: water scarcity. The situation is particularly severe in Southern Europe, where about 30% of the population lives in areas of permanent water stress, with demand consistently outpacing supply. Economist Stefan Kooths from the Kiel Institute for the World Economy estimates that the impact of low Rhine water levels alone could drag down Germany's third-quarter Gross Domestic Product (GDP) by up to 0.2 percentage points. Kooths told in an email, "It is unlikely that water levels will recover quickly enough to exceed the navigation threshold in early August. Shipping capacity is likely to be constrained for the next month. We estimate the value-added loss for the third quarter to be between 1 and 2 billion euros."
Felix Schmidt, a senior economist at Berenberg Bank, notes that German companies, as the traditional engine of European growth, are no strangers to low Rhine water levels. Under climate change, drought and water scarcity have become a recurring problem. Many businesses have stocked up in advance or shifted some freight to rail and road transport. However, Schmidt admits that soaring freight rates are currently adding to inflationary pressures. "Germany's growth is already sluggish. For example, if growth drops from 0.2% to 0.1%, that's a loss of half the economic growth," Schmidt said in a phone interview. Germany's economy grew by 0.2% quarter-on-quarter in the second quarter, following an upwardly revised 0.4% growth in the first quarter.
On July 31, 2026, the Paks Nuclear Power Plant in Hungary was seen from the opposite bank of the Danube River in Dunaszentbenedek. Hungarian Prime Minister Peter Magyar announced that the plant, which began operations in 1982, would be shut down for the first time due to record-low water levels in the Danube. The river provides cooling water for the plant, but the current water level is too low for the intake pipes to function properly. Schmidt says the drying riverbeds are just one sign of the pressure on the German economy as the climate crisis intensifies. "The water level issue is just one aspect. A heatwave that swept through Germany and large parts of Northern Europe weeks ago reduced labor productivity, damaged infrastructure, and disrupted energy supply, with nuclear plants in Hungary, France, and Switzerland facing constraints. At the same time, wildfires are raging across Southern Europe...drought, heat, and fires are dragging down the economy in every way."
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