TT Club is urging logistics providers, ports, terminals and cargo owners to treat recurring drought and low-water restrictions on inland waterways as a business continuity risk, rather than an occasional environmental disruption.
The warning lands amid an active, severe crisis: Rhine water levels at Kaub, Germany, the river's shallowest point, fell to their lowest level since records began in 1880, with forecasters saying it would take weeks of sustained rain to bring levels back toward normal, potentially dragging the disruption into October.
Inland waterways have long served as an efficient, lower-emission way to move cargo, with ships and barges on major corridors including the Rhine, Danube, Mississippi, Yangtze and Paraná carrying substantial volumes at lower cost and emissions than road transport. But recurrent drought conditions are increasing operational pressure through vessel loading restrictions, reduced draughts, navigation bottlenecks, delays, grounding incidents and rising freight costs.
The scale of the current disruption illustrates exactly the risk TT Club described. The Rhine typically carries around 70% of Europe's inland waterway freight and moves commodities ranging from diesel, heating oil and coal to grains and cocoa, serving companies including Thyssenkrupp, BASF and Lanxess.
With water levels this low, large barges cannot operate at all and smaller vessels can only carry a fraction of their usual payload, forcing shippers onto rail and road networks that lack the capacity to absorb the difference.
German chemical group Covestro has separately warned it may be unable to meet certain delivery obligations, given that more than 30% of its finished goods depend on inland shipping. Commerzbank has estimated that if water remains critically low through mid-September, it could shave around 0.35 percentage points off German GDP for the quarter.
TT Club warned the consequences extend well beyond individual vessels. Reduced carrying capacity can disrupt port throughput, create inventory imbalances at warehouses, and generate sudden demand for alternative rail and road capacity, disruption that can cascade through interconnected supply chains rather than staying contained to the waterway itself.
Recent conditions on the Danube have highlighted a further concern TT Club flagged as under-appreciated. Access to navigable waterways can be constrained by decisions entirely outside transport operators' control.
In Romania, authorities faced difficult choices over allocating limited water resources between navigation and critical infrastructure, including energy generation. That tension played out concretely elsewhere on the same river this summer, when Danube water levels fell to their lowest point in three decades, forcing Hungary and Romania to shut down their river-cooled nuclear reactors for the first time ever, before a partial rebound in river levels allowed Hungary to slightly increase electricity output at its Paks plant.
As climate pressures intensify, TT Club argued governments may increasingly need to balance water use between drinking supplies, agriculture, energy production and transportation, meaning businesses dependent on inland waterway transport could be affected not just by low water itself, but by broader societal water-allocation decisions made for entirely different reasons.
Neil Dalus (pictured), risk assessment manager at TT Club, said inland waterways remain an essential component of efficient, lower-emission freight transport, but that the assumption these corridors will always provide a dependable alternative to road and rail must now be challenged. He said drought should no longer be considered a rare environmental issue, but a business continuity risk capable of affecting vessel capacity, route availability, port operations and the wider transport network, with the real question for operators being whether they have the visibility, flexibility and contingency arrangements to manage it.
The challenge is particularly significant given that supply chain strategies increasingly favour shifting cargo toward inland waterways specifically to support decarbonisation goals.
TT Club stressed the environmental case for waterborne freight remains genuinely compelling, but argued that sustainable transport choices must also be resilient ones, meaning organisations should move beyond planning based principally on historical water levels and incorporate climate-informed decision-making into wider risk management.
The company recommended operators map their dependencies on inland waterways and identify vulnerable corridors, monitor river levels and incorporate drought forecasts into cargo and fleet planning, establish alternative road, rail and storage arrangements before restrictions actually arise, stress-test supply chains against prolonged reduced carrying capacity, review contractual and inventory arrangements for recurring low-water disruption, and use real-time data, remote sensing and predictive analytics to support earlier decisions.
Dalus said the most resilient organisations will be those that understand their dependencies, can activate alternative transport options quickly, and have already considered how their supply chains will perform under persistently constrained conditions.
