The National Center for Atmospheric Research has released a new report detailing finding that indicate rivers in world’s most populated areas are losing their water as a consequence of climate change. Researchers have determined that the descending level of water in rivers is in many cases associated with global warming, and that this trend could cause reduction of water supplies in some of the world’s most major cities.

Studies showed that Colorado River in the United States, the Yellow River in China, the Ganges in India and the Niger in Africa are steadily losing their water.

“Reduced runoff is increasing the pressure on freshwater resources in much of the world, especially with more demand for water as population increases,” says NCAR scientist Aiguo Dai.

“As climate change inevitably continues in coming decades, we are likely to see greater impacts on many rivers and water resources that society has come to rely on,” said Kevin Trenberth, also of The National Center for Atmospheric Research.