Lake Mead, the prime source of water for Clark County may run dry in 13 years according to a new study.

The study by two researchers at the Scripps Institution of Oceanography at the University of California San Diego, predicts a 50 per cent probability it will be gone by 2021 in the absence of other changes.

"We were stunned at the magnitude of the problem and how fast it was coming at us," said study co-author Tim Barnett, a marine research physicist.

It's been a bit of a surprise to boat owners whose marinas keep moving to follow the vanishing shoreline, also, but it should make a great off-roading park when it becomes a dry lake bed. Besides no water to drink, what happens if there isn't water running through the electrical turbines of Hoover Dam?