I recall reading a few times over the past decade that there was a lot of interest in some groups and or corporations buying up lands that had fresh water sources on them. We also have states that forbid land owners from collecting runoff water (no self preservation allowed).

LDR did say we would die of thirst after watching our children die of thirst.

Seems this attack vector has always been part of their strategy. So let's say they begin turning the water tap off in select areas. It would definitely shake up that population and make them reliant on the good graces of the deep state to bring in water.