I want to add if the rains never return to Calif, this will be very serious.
It seems unlikely that the rains will never return. The more serious threat of climate change over the longer term is that drought patterns may be exacerbated.
Those claiming that rains will not only find themselves discredited when the rains return (as they assuredly will), they will have provided more ammunition to those determined to stymie meaningful action on anthropogenic Global Warming. Don't do it!