Europe's Rhine and Danube rivers have fallen to record lows, disrupting transport and energy production across the continent as prolonged drought and heatwaves grip the region.

Water levels at several points along the Rhine in Germany and the Netherlands reached record lows. The Danube is similarly affected, with record-low readings hitting multiple downstream countries.

Most inland vessels could not pass the Kaub chokepoint on the Rhine by July 27, shipowners said. Vessels that do pass cannot carry full loads, shrinking effective shipping capacity and pushing cargo onto rail and road at sharply higher cost.

The disruption is concentrated in chemicals, oil products and other industrial goods. Freight rates are climbing as available river capacity contracts, raising input costs for manufacturers and distributors across Europe.

Nuclear power plants, which draw river water for cooling, have been forced to cut output. That reduction in generation is straining regional energy security during a period of elevated demand.

Higher transport costs and tighter energy supply are compounding pressure on European industrial margins. Fixed-income investors are tracking the supply-side inflation risk these conditions introduce: persistent cost-push shocks complicate central bank efforts to anchor price stability and can steepen the short end of the yield curve if inflation expectations drift higher. Duration exposure to European sovereigns carries added risk in that scenario.

European industrial output, already facing global competitive pressure, is now absorbing internal logistical constraints on top of elevated energy costs.