The entire state is flanked by water. Someone build desalination plants yesterday. Rail is just graft.
Well, in other places, UAE, Saudi Arabia, Qatar with large supplies of natural gas, massive (the largest in the world) desalinization plants have been built to supply potable water.
California could easily develop the home grown gas by fracking existing oil fields. Being foolish, the people of California would rather burn than frack
They’ve built a couple of them - but industrial desal plants don’t work well without electricity.