An interesting tweet by Elon Musk ”China’s progress in advanced infrastructure is more than 100 times faster than the US”. This gave me an idea.
Perhaps desalination plants could be constructed in a similar way within very short time limit. A week maybe. The cost need to go down also.
Even though some places don’t need desalination. I think it saves time to be prepared. They don’t need to be turned on until necessary to limit environmental effects.