I believe that CA currently caps annual increases at 6% unless the insurance company wants to jump through lots of hoops. I've also been hearing that the topic of rate increases may be up for discussion. It's entirely possible that those regulations may be eased. Insurance companies are not in the business of losing money. If they can't turn a profit in that market, they may well pull out. And given the massive CAT (catastrophe) claims they've incurred due to wildfires over the past several years, premiums are going up.
What does this mean for you? Your assessment of your fire risk is likely way off. Unless you're an expert in these things, the insurance company is going to know way more about the probabilities and potential severity of wildfires in your location. You can do things to harden your house to fire and perhaps get a deduction or limit your increase. You can feed updated information about your house and immediate surroundings to the insurance company, who can update the information accordingly and MAYBE your premiums will drop. Or go up. You could shop around.
But realistically, you need to plan that your insurance premiums are going to be higher. How much higher, I don't know. If you don't want to pay it, then you should figure out how to move to a lower risk location. I wouldn't recommend the coasts.
