I have seen so many stories on the news about people who were in similar situations. There were people who drove through flames to escape fires (in the ’91 Oakland Hills Fire as well as several more recent ones). I remember hearing of a group of people who survived by jumping into a pool or pond.
When the fire sweeps down from the hills, pushed by very strong winds, you only have seconds to leave. Spraying your house down with a garden hose will give you a few seconds, maybe. It’s better to gather important documents and photographs and leave immediately!
Make sure your fire insurance covers the replacement cost, not just the value of the house. And make sure your insurance company will cover your costs for the entire time it takes to rebuild your house. If there’s a disaster that destroys entire communities, there will be a shortage of qualified construction workers and things will take much longer than usual.