los angeles with a population of over 12 million in the metro area has no local drinking water supply as far as i am aware and they get by alrite
The dwindling water supply in the las vegas valley will only serve to slow down the movement of new residents into the valley. It will not affect the hotels imo as most of their water is recycled time and time again, its called "gray water". Las vegas also sits on a massive underground raging torrent of a river.