CA hasn’t built a new reservoir since 1975. Just think what the population has done since then.
https://en.wikipedia.org/wiki/Diamond_Valley_Lake
Construction of the three dams was completed in 1999
Just think what the population has done since then?
Added ~ 11 million more illegal aliens to it’s population. California’s water supply system was built for a native level of population. Now a high percentage of Mexico and Central America lives in the LA basin which is essentially a desert......