There is NO SUCH THING as a shortage of water. There is only water that costs more than the legacy uses can justify.
Since the oceans have not dried up, we have an unlimited amount of sea water that can be desalinated and then piped or hauled to where it is needed. However, people may not be able to afford to buy it and will have to move to where water is less expensive. But please don’t fall for this “shortage” nonsense.
The issue would be having desalination plants on-line and the necessary pipes to transport the water where it is needed.
Texas (IIRC) doesn’t have one for public use.