No, California would still have severe droughts in sections of the state, it’s just California’s climate and that hasn’t changed. What you are addressing is water shortages in over populated sections of the state. Nothing that that happened over the last few years is new, we have always had periods of drought followed by periods of excessive rains.
Concur, which is why the need for more reservoirs. The LA Aqueduct takes the majority of watershed from the Sierra Nevadas and diverts it to the Los Angeles basin.