Re: Where's the water coming from?
You can't build on the East Coast north of a famous line - too many billionaires, golf courses etc.
You can't build south of the line because .... well ....
You can't build anywhere on the West coast because there will be a rare lesser spotted ground slug and nimbys
You can't build in the middle cos hurricanes
You can't build in the north middle because ice storms, winter power cuts and crazy militias with guns
So you are pretty much stuck in a the Nevada, Arizona, New Mexico, Texas arc if you need space but few people or Tennessee + Carolinas if you need lots of cheap people