Ask HN: Is desalination the solution to California's drought disaster?

I've seen arguments for solar powered desalination. I've seen other good arguments that desalination couldn't possible solve such a large problem (too expensive, not enough output, etc). The drought in CA appears as though it could be truly catastrophic if it continues. Can Silicon Valley help contribute to innovating California out of a disaster on water? Are any VC firms funding solutions? Very curious what HN thinks on this.