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https://www.nist.gov/el/fire-research-division-73300/wildland-urban-interface-fire-73305/hazard-mitigation-methodology-24

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Engineering LaboratoryFire Research Division

## Wildland-Urban Interface Fire Group

-  HAZARD MITIGATION METHODOLOGY (HMM)  Expand or Collapse    -  Why Implement HMM in your Community?  Expand or Collapse      -  Exposures During WUI Fires 
    -  HMM vs Traditional Hazard Mitigation 
    -  WUI Definitions 
    -  Structure Survivability in the WUI 
    -  Community Survivability in the WUI 
    -  Paths forward: Implementing HMM 
    -  Communities already implementing HMM 
  -  How Fire Spreads in the WUI  Expand or Collapse      -  How do Structures Survive WUI Fires? 
    -  Fire Spread Pathways 
    -  Why Exposure Matters, not Parcel Boundary 
    -  Hazard from Fuel Agglomeration 
    -  Community-scale WUI Fire Hazards 
  -  Community-Wide Structure- and Parcel-Level Hardening Actions  Expand or Collapse      -  How Density Impacts Community 
    -  Workflow for HMM Hardening Actions 
    -  Structure Hardening for Embers 
    -  Parcel Hardening for Fire: the Three R’s 
    -  Surrounding Parcel Hazard Mitigation 
    -  Primary Parcel Hazard Mitigation 
    -  Structure Hardening for Fire 
    -  Communities Hardening Actions 
  -  Hardening Actions: Construction Guidance 
  -  Contacts 

# Primary Parcel Hazard Mitigation

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Fuel removal and displacement (when possible)is always preferable to exterior hardening.

Assess property features that can contribute to fire pathways on or across a property to protect the home (Table C):
                        - Firewood piles ($)
                        - Vegetation ($ to $$)
                        - Sheds ($ to $$$)
                        - RVs ($)
                        - Fences ($)

Additional mitigating actions and targeted hardening of the residential structure and nearby fuels may be necessary when a sufficient separation distance is not possible.

**Scenario 1**

**Scenario 2**

**Scenario 3**

-  **‹** Surrounding Parcel Hazard Mitigation 
-  Structure Hardening for Fire **›** 

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