This water scarcity has been a problem for decades, and I've heard about it for decades... Southern California vs. themselves, Native American Nations vs. American Agriculture, Mexico vs. United States... Here's a real harbinger of total disaster from way back in archaeological history: It has been researched about why so many great Cities of great Civilizations and Empires have suddenly been abandoned. Scientists from various disciplines have come to the the conclusion that Climate Change destroyed their ability to feed themselves and wash their meager remaining meals down with water... (found documentary on YouTube)