Disaster warning messages have emerged on river beds in parts of Europe. The continent faces a historic drought that has led to serious drops in major rivers. On most river beds, centuries-old cravings are chiseled in the rocks, warning the locals to expect the worst. Known as the “Hungersteine,” or “Hunger Stones,” the messages warn of the worst once these stones are visible. On River Elde, which runs from the Czechia through Germany to the North Sea, stones dating back to 1616 have been seen again.