Earlier quoted context omitted.
Hope springs eternal in California, but unfortunately water does not.
Consumer water needs are just fine. The coastal areas where most people live are building desalinization plants and will keep doing so until consumer water needs are met. When you talk about California water crisis, you are talking about California Agribusiness water crisis. Yes, the farms in the Central Valley will eventually eat themselves like Easter Island once they drain the aquifer completely.
As for the Central Valley, when the farms "eat themselves", have you considered that growing numbers of Americans will have to do the same? The Central Valley produces a quarter of the nation's food even though it represents 1% of the nation's farmland.