Overview
- A prolonged heatwave and months of scant precipitation have pushed major waterways such as the Danube, Rhine and Sava to historic low levels, leaving navigation channels too shallow for full barges.
- Low flows have forced emergency fixes at power plants that use river cooling, led to reduced hydropower output and increased electricity imports and demand‑management appeals.
- Shippers have cut barge loads, applied steep low‑water surcharges and shifted cargo onto trucks and trains, raising transport costs and disrupting supply chains along core industrial corridors.
- This month the exposed Sava revealed the 1913 steam tug Slovenian near Sremska Mitrovica and the Danube showed WWII wrecks and palaeontological finds such as woolly mammoth bones, creating safety and preservation challenges.
- Scientists link the episode to faster regional warming and say more frequent low‑flow events are likely, which officials and firms say will require long‑term water, energy and transport adaptation measures.