The numbers are disturbing and the situation potentially dire.
According to the United Nations, the global demand for water is expected to rise by 400 percent by 2050.
And figures released earlier this year by the Twente Water Centre in the Netherlands concluded that 4 billion people live under conditions of what they call "severe water scarcity" at least 1 month out of every year.
But a new survey by researchers at the Massachusetts Institute of Technology (MIT) says that a combination of changing climate and population growth will add a billion people to that total, in Asia alone, over the next 35 years.
The new research is being published today in the journal PLOS One and the authors stress that it isn't just another scary story about the effects of climate change.