In 40 years, US could face water crisis

WASHINGTON: Global warming and climate change are likely to unfold a water crisis in the United States within the next 40 years, says a new report. 

It concluded that seven in 10 of the more than 3,100 US counties could face risk of fresh water shortages. The report includes maps that identify those places. 

Sujoy B. Roy, director for research and development (R&D), Tetra Tech Inc., Lafayette, US, and colleagues explain that population growth is expected to increase the demand for water for municipal use and for power generation beyond existing levels. 

Global climate change threatens to reduce water supplies due to decreased rainfall and other factors compared to levels in the 20th century, the Journal of Environmental Science & Technology reports. 

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