This is my thinking as well.

Maybe it would be cheaper to build water pipelines + green powered desalination + pipe water from the great lakes or wherever it's in abundance. Especially if we can't or won't move crops? It seems like that growing environment artificially watered does improve yield?

Maybe it will happen if we accurately price water, just like we need to with oil, so that the incentives actually align with the bad consequences of the status quo.

I wish the infra bill spent most of the money on green energy and plans like this. Spending it on cars and fortifying against floods and weather seems like a losing battle if we don't fix the underlying driver of this chaos.