Half of the west's forests need to burn. Secondly, resources are few and far between right now. Western states are all burning. Washington and Idaho have over a hundred fires burning. Nevada, AZ, Utah, Montana all have blazes and high danger.
There are not much resources to send. Heck, I think it was Utah that is bringing in Mexican fire fighters. Soon they will be taking them from anywhere they can get them. All tankers and water droppers are in use. Plus California can't build a single toilet for less than 6 million dollars, so don't expect them to get much right. This included.