This is what happens if people think they can outsmart nature:

" .. But that is an enormous, perhaps impossible, challenge in the Southwest, which scientists say has millions more inhabitants than nature intended, or for which it can provide ..
Eventually, millions of residents, as well as the businesses that serve and support them, may be confronted with an inability to continue living in the arid, parched desert of the American Southwest ..
.. A 2008 paper in Water Resources Research stated that at current usage allocation and projected climate trends, a 50% chance exists that live storage in Lakes Mead and Powell will be gone by 2021 .. "

.... some may think of this as a business opportunity - now you know why "NESTLE" bought some water rights in California. Five years wait - and then cashing in on the investment!