Amid an unprecedented summer of extreme heatwaves, drought, and wildfires, several of Europe’s major rivers are drying up. Sections along four of Europe’s longest rivers—the Loire near Saumur in France, the Po near Cremona in Italy, the Rhine near Boppard in Germany, and the Danube near Paks in Hungary—are exceptionally low, satellite data shows. It is also an important source of hydroelectric power and cooling for nuclear power plants. But in a competition to find the oldest object, residents living along the Danube in Bulgaria have Horváth beat. While undoubtedly cool, these discoveries do little to distract from the significant, far-reaching consequences of severe drought in the Danube and other important European waterways.