Roof-to-wall intersections provide spaces for leaves and other debris to accumulate, which can expose the vulnerable exterior wall and roof to ignition from embers.
Skylights create additional hazards when leaves and other debris accumulate around the skylight unit and it becomes vulnerable to ignition from embers. A compromised skylight is an entry point for embers and flames into your home.
Ridge and off-ridge vents can be a point of entry for embers and flames into your home.
Wood roofs are very vulnerable to wildfire, particularly from embers. The highest priority for a home with a wood roof should be replacing the roof with a Class A roof covering (asphalt fiberglass composition shingles, tile, or metal).