In late July 2026, the Viking-operated river cruise ship Viking Ullur ran aground overnight on the Danube River between Serbia and Romania. The vessel carried 186 passengers and 52 crew members when it drifted outside the navigable channel during darkness. Authorities conducted a daylight evacuation the following morning, transferring passengers by small boat to a second ship and then bused them approximately five hours to Bucharest, Romania. No injuries were reported, and officials affirmed the ship was never at risk of sinking.
Record Low Water Levels on Danube and Rhine Rivers
Water levels in the Danube River hit historic lows during July 2026. Hungary’s water authority measured the river
at Budapest at just 10 centimeters, breaking the previous record low of 33 centimeters set in 2018. Serbia and Croatia also reported record low river depths, forcing vessels to navigate at roughly half their normal load capacities. Similar conditions were observed on the Rhine River, where the gauge at Kaub, Germany, fell below its 2018 low during the summer of 2026.
Industry Responses to Low Water Levels
Major river cruise operators have adapted their operations to address the drought-induced low water levels on the Danube and Rhine. Avalon Waterways and Uniworld canceled select Danube departures during summer 2026. AmaWaterways, Viking, Scenic, and Riviera Travel continued cruises
by reducing ship loads, transferring passengers to sister vessels past shallow river stretches, or employing bus transfers to maintain itineraries. These measures have been described as operational adjustments rather than safety hazards.
Expert Advice on Booking River Cruises Amid Drought Conditions
Duncan Greenfield-Turk, CEO of Global Travel Moments, recommended booking river cruises with awareness of potential disruptions, especially during the late summer months from late July through September, which carry the highest risk for low water levels. He advised selecting cruise operators with contingency plans and maintaining flexible travel arrangements. Emma Guse, River Cruise Specialist at Travelmation, noted that some clients experienced itinerary changes requiring alternate port boarding and
bus transportation, affecting the cruise experience in cities like Budapest.
Traveler Impacts and Itinerary Changes
Passengers have encountered itinerary modifications including one-to-two-hour bus commutes and boarding ships at alternate locations due to low river levels. Kristin Freeman, CEO of FlyOver Travel, reported instances where several sailing days were replaced by extended bus rides and hotel stays, along with changes in ports of call and occasional canceled departures. Brian Rooney, Founder of GetCruiseInfo.com, emphasized that travelers need to consider their willingness to accept motorcoach transfers as part of their vacation experience amid these conditions.
Climate and Environmental Causes of Low Water Levels
The severe drought and heat waves of 2026, combined with a reduced
Alpine snowpack, led to the record low water levels on major European rivers. Climate analysis attributes an approximately 80-fold increase in the likelihood of such intense evaporative drought conditions to human-caused warming. The low water levels exposed historic WWII German warships near Prahovo, Serbia, and revealed extensive cracked riverbeds normally submerged.
Industry Leaders on Navigating 2026 River Cruise Challenges
Duncan Greenfield-Turk stated, “Is it still smart to book? Yes, but book with your eyes open.” Emma Guse emphasized the significance of sailing into city centers for the cruise experience while acknowledging the disappointment some travelers face due to bus commutes and itinerary changes. Kristin Freeman remarked, “The more
disappointing situation is when several days of sailing are replaced by long bus rides and hotel stays. We’ve seen this summer, along with changed ports, missed stops, and some canceled departures.” Brian Rooney highlighted the importance of traveler acceptance of motorcoach substitutions, posing the question, “Would you still be happy with this vacation if part of your river cruise became a motorcoach trip?”
