I’m betting that cycles show this drought is not unexpected or unusual in terms of great spans of time.
I grew up in Northern Cal and lived there from 1976 through 2003.
Growing up, the state weathered through a couple spans of three and four year droughts. It never got as bad as they are experiencing now. California is a desert climate, there are rainshadow effects that favor the coastal areas but do nothing for inland valleys. When it does rain, it can rain for a couple weeks solid, flood, cause mud slides, then not rain again all year.
There are millions more consumers taxing an already scarce resource thanks to tech and crimigrants. It’s man made to be sure, but not from globull warming.
Farmer’s get cut first, but it’s my opinion that cutting back farmer’s water access kills the buildup of moisture available in the valleys for clouds to recharge and dump at the Sierras where it’s held in snow pack.