Lots of blogger righties revel in California's water woes in a "God is punishing the Libs" sort of way (there's usually a conception that everyone in blue states is liberal and everyone in red states is conservative). The usual blame is not on drought (which could be connected to climate change, and that is not an allowed thought) but is reserved for environmentalists.

Anyway, Californians leaving because of a water shortage may be blue or red, but it's for certain that the culture of California is certainly more liberal than that of, say, Oklahoma. So there will be a culture clash, and probably a resentment of anyone who is from California, in the states where those folks might go.

You never change things by fighting the existing reality.
To change something, build a new model that makes the old model obsolete.
R. Buckminster Fuller