Not without the water they get from Colorado, Wyoming, Utah, and Nevada, they wouldn't. Without resources from these small flyover states, California has no economy at all.
That's part of the problem I see with a lot of the current political rhetoric. The big states and the small states need each other. You can talk about how New York and California are makers and the smaller states are takers, but New York can't by any stretch of the imagination feed itself. There is an interdependence that all states, large and small, red and blue, need to acknowledge.