And if what everyone is saying is true about storing water in tanks being illegal in CA, Then CA is doomed. Half of the mid west have Water Towers full of water which are tested yearly. But the down fall to that is bird poop and the purification process, not to mention all the water in the Midwest is tainted by the use of farming chemicals. But still having a stable storage of water is better than running out of water forever. They might have to create cloud water, or drink water from a dehumidifier. The best survival option for people in California is making sure every house hold has a dehumidifier if the water shortage ever reached critical levels.