The summer of 2026 has delivered a scorching blow to Europe, leaving its mightiest rivers running perilously low and sending ripples of disruption across industries, communities, and ecosystems. The Danube, Rhine, Loire, and other storied waterways are at the center of a crisis that scientists and industry leaders warn could become the new normal as climate change intensifies. The facts on the ground—and in the water—paint a stark picture: from exposed sandbanks and sunken relics to stranded cruise ships and energy worries, the continent is facing one of its driest years on record.
On August 12, 2026, in Novi Sad, Serbia, the Danube River’s water levels dropped so dramatically that newly exposed sandbanks became visible, according to Reuters. The cause? Prolonged hot weather and a stubborn lack of rain—a pattern echoed across the continent. As The National reports, data from the Copernicus European Flood Awareness System shows six-hourly water discharge readings for major rivers have remained well below the long-term seasonal average. Compared to both the 1992–2020 average and last year’s figures, rivers are carrying far less water, with repeated heatwaves and drought compounding the crisis.
“This year is on course to become one of the driest on record,” The National notes. The Rhine River in Germany, a crucial commercial artery, has slowed to about 692 cubic metres per second—far below its seasonal average of around 1,900 cubic metres per second. That’s not just a number on a gauge; it means shipping is restricted, vessels must carry lighter loads, and transport costs are climbing. In the Netherlands, the receding waters have revealed a sunken ship from 1895 between Tolkamer and Spijk, a ghost from the past brought back by present-day climate woes.
The Danube, Europe’s second-longest river, has been hit especially hard. In Hungary, the national water authority measured the river in Budapest at just 9.1 inches in late July—well below the previous record low of 13 inches set in 2018, according to Town & Country. That’s a staggering drop, considering most river cruise ships need four to five times that depth to operate safely. In Romania and Bulgaria, shipping on the Danube has ground to a halt. The consequences are more than economic: in Serbia, the shrinking river has exposed the wrecks of German World War II warships, while in northern Bulgaria, the remains of an ancient mammoth have emerged from the mud.
The impact on the river cruise industry has been swift and severe. For companies that plan itineraries years in advance, the summer’s unpredictability has forced a scramble of cancellations, reroutes, and contingency plans. Avalon Waterways confirmed in July that several departures of its “Danube Dreams” itinerary had been canceled. Riviera Travel avoided outright cancellations but modified excursions and destinations across seven ships, Travel Weekly reported. Uniworld passengers on one Danube itinerary found themselves flown from Bucharest to Munich to board their ship in Passau. “I’d say if you’re sailing within the next week to 10 days, there is a very high likelihood you'll be switching ships and having adjustments to your itinerary,” travel advisor Jennifer Elysia told Travel Market Report.
The disruptions have been especially acute on the Danube. The AmaSofia, a new AmaWaterways ship, set out from Vilshofen, Germany, with Budapest as its final destination. Instead, it made it only as far as Melk, Austria—about 54 miles from Vienna. Guests finished their journey to Budapest by bus, not by boat. Captain Niels Springer of the AmaSofia described the logistical ballet required to manage such disruptions: “Everybody right now is playing the biggest game of musical chairs possible,” he explained. Ships unable to reach their berths free up docks for others, causing a cascade of last-minute changes. “Either guests go from ship to ship, if they have swap ships,” Springer said. “If you don’t have that, then you have to make do the way it is.”
Sometimes, the stakes are even higher. On July 28, 2026, the Viking Ullur ran aground on a sandbank in Bulgaria during exceptionally low water. There were 186 guests and 52 crew onboard. Viking assured the BBC that “sufficient water remained available for all guests and crew throughout the incident. At no point did the vessel run out of provisions or experience a shortage.” All passengers were safely transferred ashore and continued their itinerary, but the incident underscored the risks of navigating Europe’s rivers in a summer like no other.
Behind the scenes, cruise companies have developed a toolkit of contingency measures. Ship swaps, bus transfers, and itinerary modifications have become standard. Jon Burrows, AmaWaterways’ chief operations officer, described a round-the-clock operation: “Our teams are already discussing different scenarios, reviewing contingency plans, and deciding which option will have the least impact on our guests.” The company’s strategy of positioning sister ships on opposite rotations along the Rhine and Danube allows for quick ship swaps—guests simply move to an identical ship further along the route. “Rather than simply transporting guests, we incorporate the transfer into the experience, often including sightseeing along with lunch,” Burrows said.
Travel advisors now routinely counsel clients to expect the unexpected. Laura Comer from Fora Travel compared the drought’s impact to a poor snow season for ski vacations: “You can’t predict exactly what conditions will look like when someone travels six months or a year from now. But once you’ve seen something have a real impact on trips, it becomes part of the conversation you have with clients going forward.”
The consequences reach far beyond tourism. In Romania, authorities resorted to controlled explosions to clear rock from the Danube, redirecting more water toward the Cernavoda nuclear power plant, which relies on the river for cooling. Similar concerns have emerged in Hungary, where nuclear plants depend on the Danube’s flow. The receding waters have also surfaced relics of history—a sunken World War II battleship in Serbia, the ruins of Budapest’s original Franz Joseph bridge destroyed in 1945, and the remains of a woolly mammoth in Bulgaria, as highlighted by Town & Country.
Other rivers are faring no better. The Rhine’s low flows have disrupted shipping and cruise traffic, especially near Koblenz. Parts of the Rhone in Switzerland and France, Italy’s Po river, and long stretches of France’s Loire have also seen exceptionally low levels since late June. Scientists attribute the widespread decline to one of Western Europe’s hottest starts to the summer, warning that heatwaves and droughts are becoming more frequent and intense as the planet warms. “The climate is really changing,” Captain Springer observed. “Sometimes we have low water in winter and high water in summer, or vice versa. Right now, this is considerably close to a normal time to have low water. But this extreme, what we have now, we could move between certain points. But after that bridge over there, we’d hit rocks.”
Looking ahead, cruise companies are investing in flexibility and resilience. AmaWaterways plans to add two new vessels by 2028, completing its sister-ship deployment across the Rhine and Danube. “While we’re seeing more frequent weather extremes than in the past—whether periods of low water, heavy rainfall or heat waves—these conditions are not cyclical. They are driven by nature, and they can occur at different times of the year,” Burrows said. Sustainability and climate resilience are now priorities, though no amount of planning can fully insulate a river cruise from what the river decides to do.
For now, Europe’s rivers remain at the mercy of the weather, their fate a powerful reminder of climate change’s reach and unpredictability. As Captain Springer put it with a sigh, “If there’s no water in the river, there’s not much you can do at some point.”