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All dried up?

February 8, 2011, 3:00 PM UTC

The Southwestern U.S. is nearing a water emergency. Lake Mead, the nation’s largest reservoir and the Hoover Dam’s power source, is at less than half of capacity — dangerously close to the point where the water stops powering the dam. The shortage has been fueled by a population boom and a decade-long drought. —Anne VanderMey