The Rhine and Danube have reached historic lows. Dwindling water levels are affecting shipping, agriculture and ecosystems — and raising concerns about the future of drinking water supplies.

The Rhine River’s water levels dropped to the lowest in almost 150 years as hot, dry weather scorches Europe, threatening to disrupt a crucial route for transporting coal, fuel…

Rivers serve a critical function in Europe's energy supply, cooling power plants and allowing fuel to be delivered