State law requires property owners in fire prone communities to have 100 feet of defensible space around their homes. This includes removing all potentially fire-prone vegetation, but not all vegetation, from 30 feet immediately surrounding a property, and creating space between trees and other vegetation for an additional 70 feet around the property.
Pics I’ve seen from residences damaged by wildfires suggest compliance is not universal.
And then there’s wood roofing....
If the flame front reaches 50-100 ft high normal scrub clearance won’t make a lot of difference. Embers, large ones, can fly for miles in these winds. They land on your roof, in your trees, get sucked into your attic vents. You should do all that you can but some of these brush fires are huge with high winds pushing them.