Rivers worldwide experienced one of their driest years in decades in 2025, the World Meteorological Organization said, reflecting declining water storage across the Earth's surface and raising concerns about future supplies ↧ River flows were among driest in decades in 2025, World Meteorologi... Rivers worldwide experienced one of their driest years in decades in 2025, the World Meteorological Organization said on Thursday, ​reflecting declining water storage across the Earth's surface and ​raising concerns about future supplies.