Those cities (particularly Las Vegas) are actually mostly quite water efficient. Its ag in the desert that is the issue.

Do you want the food that is produced in the CA Central Valley (a huge, huge proportion of all US produce) or not?

This is a straw man, no one is suggesting to stop growing food on irrigated farmland but to focus on efficient irrigation and grow things more suitable for the limited water, see the suggestions from the SNWA

https://s3.documentcloud.org/documents/22136304/2022-8-15-ne...

Why do you think people live in the cities in the desert near the CA central valley?

I'm not sure what you mean, what cities in the desert near the central valley? Reno, Lancaster?

I'm not sure "cities in the desert" the GGP was meaning. Typically this means places like Phoenix, but that's not in California.

All of socal is a desert. So Bakersfield, San Bernardino, etc. pulling from the Colorado river.

Sacramento, Fresno, etc pulling from the Sierras.

Heat has little relevance here, so LA is just as bad as PHX for residential water consumption (excluding lawns).

I am pretty sure Bakersfield does not pull water from the Colorado river.