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The global water supply is dwindling rapidly, according to a recent report by the World Meteorological Organization (WMO). The amount of water flowing through rivers worldwide has been decreasing since several years ago, with rivers shrinking, glaciers melting, and groundwater levels falling in many regions, as reported by German news agency dpa.

Central and Eastern Europe has been hit particularly hard by lower groundwater levels in 2025, according to the WMO's annual State of Global Water Resources report released on Thursday. Some other areas recorded deficits much greater than the 2014-2024 period, while groundwater levels in most of Northern Europe were above the long-term average.

Human-induced climate change, increasing global demand for water, and dwindling natural supplies are all contributing to the changes in water sources, said Wayne Jenkinson, head of the WMO's Hydrology and Cryosphere Division. Water reserves have been steadily decreasing over several decades, including groundwater, water stored in lakes, glaciers, soil, vegetation, ice, and snow.

WMO Secretary-General Celeste Saulo likened the water deficit to a savings account that has previously helped to cope with dry seasons. Almost two-thirds of monitored reservoirs had less water last year compared to the long-term average, according to the report. The amount of water flowing through rivers globally was also at its lowest in three decades, according to the WMO, indicating that the world is now drawing down its savings account.