I mean it's even simpler. Almonds are entirely non essential (many other more water efficient nuts) to the food supply and in California consume more water than the entire industrial sector, and a bit more than all residential usage (~5 million acre-feet of water).

Add a datacenter tax of 3x to water sold to datacenters and use it to improve water infrastructure all around. Water is absolutely a non-issue medium term, and is only a short term issue because we've forgotten how to modestly grow infrastructure in response to rapid changes in demand.