Most homes in a wildfire ignite from embers, not flames
When a wildfire reaches a community, the front of flame usually does not arrive first. What arrives first is a shower of windborne embers that can...
When a wildfire reaches a community, the front of flame usually does not arrive first. What arrives first is a shower of windborne embers that can travel up to two kilometres ahead of the fire. Those embers land on roofs, in gutters, under decks, against fences, and in flower beds. FireSmart and Firewise USA / NFPA treat embers as the dominant ignition pathway for homes in the wildland-urban interface, which is why almost every recommendation in the home ignition zone — clean gutters, screen vents, rock mulch in the first 1.5 metres, ember-resistant decking — is built around stopping embers from finding fuel. Direct flame contact and radiant heat still matter, but they only happen if a fire reaches your property line, while embers can ignite homes that look untouched by visible flame. The practical takeaway is that a defensible home is one where embers land and find nothing to burn: a clean roof, screened vents, a non-combustible buffer at the foundation, and no stored fuel against the walls. None of those upgrades require a forest evacuation or a perfect lot — just attention to the small surfaces where embers settle.
Wind-driven embers can travel up to two kilometres ahead of a wildfire — most homes that burn are ignited by ember showers long before any visible flame reaches the property.
Source: FireSmart BC
Last reviewed 2026-05-02.
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