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A World Meteorological Organization assessment found that 2025 was among the driest years on record for the world's rivers, with global freshwater reserves — including groundwater, lakes and rivers — depleted to 42% below normal levels. The Guardian has launched a year-long 'Our Rivers' project examining the mounting pressures facing waterways worldwide, from overuse to climate-driven depletion. The findings underscore growing concern about water security as rivers that sustain agriculture, trade and ecosystems around the world show signs of severe strain.