It won't happen. What you're likely to see is a sharp increase in political assassinations. During times of existential crises, you see people popping up with nothing to lose and a lot to say and they finna talk with weapons.
A water crisis should not be possible when there are desalination technologies that turn salt water into fresh water. Vertical farms and GMO crops that need less water to produce a high yield. The technology and means to do it is there. We could have genetically modified trees that suck up more carbon than the regular kind. We can integrate plants into new buildings to cool them and pull out carbon from the atmosphere. We can be significantly smarter with how we use the limited amount of water that's on earth.
The problem is the political actors and the men with money. The politicians are beholden to the money men and the money men aren't willing to inconvenience themselves in the slightest even if it means the existence of humanity continuing.
So what you'll see is more assassinations because people won't want to wait anymore for action. You might see eco fascist groups winning elections and you might potentially in the worst case scenario see France style revolutions where anyone making over 80k is a target.
Desalination is an option but the energy requirements are enormous. It just takes a tremendous amount of energy cost to produce a similar unit of fresh water. Unless you running these desalination plants with nuclear power it’s going to become cost prohibitive. The higher cost of water will cause everything else to rise astronomically.
At the end of the day it’s an option but not a economically feasible one.

. Nah, they would be fukkin shook. fukk them
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