The three main sources of ignition during a wildfire are embers, direct flame contact, and radiant heat. This is why the FPA and others have the three different

The three main sources of ignition during a wildfire are embers, direct flame contact, and radiant heat. This is why the FPA and others have the three different zones, of particular distances, where they recommend doing particular things. House can survive large quantities of radiant heat: * https://www.youtube.com/watch?v=Dq6wy_tffpg https://www.youtube.com/watch?v=Dq6wy_tffpg Quite often what happens with radiant heat is that it breaks a window, which then allows embers to go into the house and set it alight. Embers are actually the things that cause the most damage: * https://www.intermap.com/risks-of-hazard-blog/2015/03/does-your-wildfire-model-include-ember-zones https://www.intermap.com/risks-of-hazard-blog/2015/03/does-y... * https://ibhs.org/ibhs-news-releases/embers-cause-up-to-90-of-home-business-ignitions-during-wildfire-events/ https://ibhs.org/ibhs-news-releases/embers-cause-up-to-90-of... On the other hand radiant heat often kills people the most (e.g., through heat stroke).