Low Rhine Water Threatens Swiss Supply Chains and Could Push Up Prices

The Rhine fell to 6 centimetres at Kaub in August, cutting into one of Switzerland’s most important freight routes. The German measuring point sits on a heavily used stretch of river that links Rotterdam’s port complex with Basel and the wider Swiss economy. When water levels drop, vessels must reduce their loads to avoid grounding. Some freight then moves to roads and railways, both of which have limited spare capacity.

The disruption reaches far beyond shipping companies. Fuel, grain, animal feed, gravel and cement all depend on economical bulk transport. A large inland vessel can carry roughly 100 times as much as a lorry, with fewer workers. Removing that capacity forces shippers to pay more for replacement transport, reschedule deliveries or leave cargo waiting at ports and terminals.

The Rhine was not the only European river affected. The Danube in Hungary and Romania, Italy’s Po and France’s Loire also reached exceptionally low levels. For Swiss importers, the immediate concern is the cost and reliability of goods arriving through Basel. A longer disruption could affect petrol stations, construction sites, food processors and retailers at the same time.

A river cargo vessel can carry about 100 times the freight of a lorry, which makes replacement transport expensive and difficult. At low water, vessels cannot load to their normal draft. Operators may split one shipment across several trips, use smaller craft or transfer cargo before it reaches Basel.

The cost rises fastest for heavy and bulky goods. Sand, fuel and grain have low value relative to their weight, so transport charges represent a significant share of the final price. There are few cheap alternatives when river capacity disappears. Road haulage can take the cargo, but each additional truck consumes fuel, drivers and road space. Rail can absorb part of the volume, although available paths, terminals and rolling stock are finite.

The pressure is already visible in fuel logistics. Julia Arlinghaus, a professor of logistics and supply-chain management at the University of St Gallen, said road transport became markedly more expensive during the summer. At times, moving fuel from Rotterdam to Basel cost ten times more. Swiss companies can negotiate, delay or seek other suppliers, but those measures rarely erase the underlying freight bill.

Transport bottlenecks may have added about 16 centimes to a litre of fuel, almost 8% of the cost of filling a tank. Arlinghaus told Le News that the effect reached Swiss petrol stations as the cost of moving fuel from Rotterdam to Basel climbed. The figure does not mean every station or shipment faced the same increase. Energy prices, taxes, exchange rates and local competition also shape the price displayed at the pump.

The Rhine disruption can still pass through the economy in several ways. Fuel distributors may pay more for alternative haulage, while wholesalers face delays and extra handling charges. Retailers then decide whether to absorb those costs or reflect them in prices. Businesses that operate vans, trucks, machinery and heating systems feel the effect before households see it in shops.

Food supply chains face a similar exposure. Grain and animal feed move in large volumes on inland waterways. Higher freight costs can therefore reach bakeries, farms and meat producers, eventually affecting bread, eggs and meat. Construction faces its own pressure from the cost of transporting gravel and cement. The final price impact is difficult to isolate, but the logistics shock adds another cost to already volatile markets.

Climate projections point to longer periods in which Europe’s inland waterways cannot carry freight normally. Today, extremely low water levels may persist for about 40 consecutive days. That period could rise to 80 days in the future, according to Massimiliano Zappa, who heads meteorological forecasting at the Federal Institute for Forest, Snow and Landscape Research.

Zappa told SRF that Europe had not experienced conditions like these since the 1940s. He also estimates that episodes of this kind could occur twice as often by the end of the century. The Rhine’s problems form part of a broader European pattern, with unusually low levels recorded on the Danube, Po and Loire during the same summer.

For Swiss logistics planners, the issue is the frequency and duration of disruption. A short interruption can be handled through inventories and temporary rerouting. Repeated low-water seasons require companies to redesign contracts, add storage, reserve rail capacity and reconsider where they hold fuel or raw materials. Those preparations cost money even when the river is navigable. Climate risk is therefore becoming a supply-chain planning variable, not only a hydrological statistic.

A permanent shift of only 4% of inland waterway freight to lorries could add about 1,000 trucks a day on the route to Basel. The estimate illustrates why a percentage that looks small at European level can become substantial at a Swiss border and logistics hub. Basel already connects river terminals with national motorways, rail freight routes, warehouses and industrial sites.

More road freight would increase competition for drivers, loading slots and motorway capacity. Rail can take some diverted cargo, but freight trains need available paths and suitable terminals. Switzerland’s geography leaves little room for easy expansion around dense urban and industrial areas. Delays can spread through the network when one terminal, border crossing or distribution centre reaches capacity.

Companies will respond in different ways. Some may build larger inventories, seek suppliers closer to Switzerland or sign longer-term rail contracts. Others will continue using the Rhine when water levels permit, because its cost and scale remain difficult to replace. The immediate question for Swiss businesses is how much resilience they can afford. For households, the likely result is a gradual pass-through of higher transport and storage costs across fuel, food and building materials.