Fences

Bottom line

Wood fences connected to and within five feet of structures can carry flames like a fuse to a structure when ignited by debris and embers during a wildfire. Remove or replace sections with noncombustible materials to interrupt fuel continuity.

Here's a video from the Insurance Institute for Business and Home Safety that shows how fences are vulnerable to ember and debris accumulation during a simulated wildfire.

Fences are vulnerable to ember ignitions in wildfires