Rhine drought of 2018
A weeks-long heatwave dropped the Kaub gauge to 25 cm, the previous record low. Barges sailed at a fraction of capacity, and operators shifted cargo to rail and truck across Germany.
Transport costs spiked and some factories trimmed output as the federal government weighed emergency measures.
The disruption made Germany's reliance on low-cost river freight a policy topic and pushed operators to plan for more frequent low-water events.
It set the 25 cm record that August 2026's 6 cm reading broke, and it showed the scale of disruption a shallow Rhine causes.
