From my experience as someone having moved to California from Canada, it seems there is quite a large homeless population which actively chooses to be in California as opposed to other places owing to its extremely mild climate.

Since I moved to San Jose, it's only rained a handful of times, and this place's harsh colds of winter have reached such dreadful temperatures as I'd witness on a mild fall day in my former country of residence.

That certainly can't help those numbers, even if I do think the absurd costs of living are quite bad, depressing the QOL for everyone outside of the engineer class here.