Another thing that is new is that the rainy season in CA is starting later, such that the winds come before the rain.

Paradise is a wet place that gets quite a bit of rain - what matters is that it is coming too late.

For this reason, I don't think it is very relevant that the last century has been the wettest in awhile.

That said, there are likely many factors involved, and it is probably not super useful to point at one thing and ignore all the rest.