I tend to think @Stephen DeThample and @Matt Devincenzo are both on to something. I enjoyed my time in SoCal, but farming consumes a lot of water. I think part of the creative solutions people will have to make in the future is restricting farm land and implementing crop type regulations. Which could potentially be managed by bringing in crops from other states, redistributing supply chains if you will.
It’s possible that desalination is a viable option, but my understanding is that, that technology still has some less than desirable environmental impacts (I could be wrong). I believe desalination is being used in many places around the world, I’m just not sure it how it would work in CA. As far as pipes moving water between water systems I’m always concerned because we as people tend to miss something and next thing you know we’ve destroyed another ecosystem.
I think this is a great question, both of these gentlemen make great points, and it will be Interesting to see how this all plays out. But local policies toward landlords drive my investment locations more so than the impact of global warming.
Best of luck to you.