State of global water resources 2025

The WMO State of Global Water Resources Report shows that the water cycle has become more erratic and unpredictable, swinging between too little or too much. The past seven years have seen the fewest rivers with “normal” flows since 1991. Asia and Africa together accounted for at least half of all recorded water-related extreme events and more than 80% of reported associated deaths over the past five years, it says.

The State of Global Water Resources report, published annually by WMO, provides a comprehensive quantitative overview of global water resources, with a focus on hydrological variability and trends. It supports countries, decision makers and stakeholders in understanding the current state of water resources, identifying areas with significant anomalies and supporting effective water management strategies. The report is based on data contributed by WMO Members, as well as information from global hydrological modelling systems and satellite observations provided by various partners.