Thinking about moving to blackhawk, worried about fire risk

Hi,

I am thinking about purchasing a house in Danville, CA in the 94506 zip code, but when looking for home insurance, it's becoming apparent that all home insurers have pulled out. Looking at the Cal Fire map, it looks like parts of Blackhawk are in the 'extreme' fire zone. How concerned should I be? I'm not sure how to accurately weigh the risk. Please help.