According to this mornings CBS News, CA agriculture is 2% of that states economy, yet uses 80% of the water. Apparently they have one year of reservoir water left, at current usage. Agriculture depends on draining the fresh water aquifer through pumping, which causes salt water to rise and poison the soil. As of now, growers have been given a pass on water restrictions imposed by Governor Brown. Still many acres have been left fallow because of water shortage and price. CA produces the majority of our fresh fruits and vegetables. If the drought continues, they won't be able to and we will have to look elsewhere for produce.
Of course this has nothing to do with climate change, and we have been assured that even if the climate patterns are changing (which is undeniable), human activity isn't responsible, so we have nothing to worry about. Also, the corporations who own the politicians who make the decisions that could start to halt the environmental destruction (that might keep food on the table in the future), need to maintain their bottom line. Right up to the end.