Structural Triage In Community Wildfire Interface

Defensible: only with sprinkler support - embers/sparks can get under would decks, vegetation dense at rear of house
Defensible: deciduous trees (lower volatility) with ladder fuels removed, metal sideing as oppssed to wood.


What is Structural Triage? During a wildfire, structural triage is the rapid assessment process firefighters use to decide which homes can be safely and effectively defended. Because resources are limited and life safety is the top priority, firefighters categorize structures into a few main groups:

  • Standalone / Not Threatened: The property has a good "safety zone" and clear defensible space. It has very few tactical challenges and will likely survive the fire front with little to no active firefighter intervention.
  • Defensible (Prep and Hold): The home is threatened by the fire, but it has a safety zone. Firefighters can safely stay on-site to prep the structure and actively defend it as the fire passes.
  • Non-Defensible (Prep and Leave / Rescue Driveby): The property lacks a safety zone, is surrounded by heavy fuels, or has serious hazards. It is simply too dangerous for firefighters to stay. If time permits, crews will quickly do a rescue check for civilians or apply rapid mitigation, but they will retreat before the fire hits.

The Takeaway for Readers: Firefighters will not commit to staying at a structure if it doesn't have a safe refuge area. It is the homeowner's responsibility to create defensible space before an incident occurs so their property lands in the "Defensible" category.

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