In 2005, Americans used 410 billion gallons of water a day. In the spirit of the soon-to-commence-we've-heard London Olympics, that's enough to fill 620,808 Olympic-sized swimming pools. In the spirit of the 2000 Sydney Games, it's three times the amount of water in Sydney Harbor. (How much we use now is probably similar, but the U.S. Geological Survey's research on 2010 won't be ready until 2014.)
Half of the water we use goes to power generation. Michael Webber, associate director of the Center for International Energy and Environmental Policy at the University of Texas, finds that worrisome, given our recent water-access difficulties. (Yes, we're talking about the drought again. Get used to it.) He wrote an editorial for The New York Times titled, "Will Drought Cause the Next Blackout?"
During the 2008 drought in the Southeast, power plants were within days or weeks of shutting down because of limited water supplies. In Texas today, some cities are forbidding the use of municipal water for hydraulic fracturing. The multiyear drought in the West has lowered the snowpack and water levels behind dams, reducing their power output. The United States Energy Information Administration recently issued an alert that the drought was likely to exacerbate challenges to California’s electric power market this summer, with higher risks of reliability problems and scarcity-driven price increases.