Incompetent management is the biggest factor.

Man made fire problems are blamed on climate change. Proper management includes forced burning and/or cutting trees. A lot of left wing enviromental professors recommended this in 2003. I haven't kept up with the literature since.

The state has phased out oil drilling and nuclear plants; the next target is natural gas. Hydroelectric plants and dams are also being dismantled. The goal is to get all energy from solar and wind (an impossible goal).

edit: Trees consume too much water. The best part about California is fake not real trees.