California is a big place, and that's not what the numbers look like in the Bay Area.
https://covid19.sccgov.org/dashboards
https://covid19.sccgov.org/dashboard-wastewater
I actually don't think the numbers will rebound; once everyone is protected from delta+omicron that does _not_ mean a new variant can keep appearing forever. It has to be different from both of them for immune escape, and that gets harder each time.
Also, we have antivirals now (paxlovid) which we didn't have even a month ago and are very effective.