Not sure where you're from, but I grew up in and live in the Central valley, and I'm not exactly a big fan of the Ag industry.
The water problem is mostly a nut (Almost, Pistachios, Walnuts) problem, which are cash crops. If the price of nuts spike, nobody is going to go hungry and nobody's grocery bill is going to skyrocket. Farmers are already fallowing almost all row crops due to the higher price of pumping water over surface water and the lower profit margins. Row crops are what people actually eat, yet prices are not spiking out of control. This is because, contrary to what people here in the valley actually think, the world and nation does not depend on California to eat. Our food markets are world markets. For a few months out of the year here, things like lettuce and tomatoes are very cheap, because they are in season. For the rest of the year, the prices are higher, but not unaffordable. We're talking $0.99/lb vs $1.99/lb for tomatoes two months out of the year.
There already are many large portions congressional districts with 50% unemployment. Normal unemployment for these districts is 25%, so this is only a recession for these areas. Most of the unemployed are exploited undocumented immigrants who are intentionally hired by crooked labor contractors who know exactly who they are hiring but pretend not to.
Ag makes up, at best, 2% of California's GDP, yet this relatively small industry spends big time money of politicians. As a result, Ag is severely under regulated and in my opinion, their volume/profit driven business models are doing more harm than good to our state.