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Community-Wide Structure- and Parcel-Level Hardening Actions

HMM is a community-wide, exposure-based approach to reduce fire-spread hazards to each structure and parcel.

  • FIRST, Remove, Reduce, and Relocate parcel-level fuels,
         THEN, assess for cost-effective home hardening.

  • A significant increase in structure ignition prevention is achieved by protecting structures against the complete range of potential exposures.

  • This necessitates that all structures are fully hardened for high ember exposures.


Three important considerations when assessing fire spread within and across parcels are: 

  1. parcel boundaries typically limit the continuity of protection between parcels,
  2. linear features can carry fire very efficiently within and between parcels, and
  3. fuel agglomeration has significant impact on energy release and fire spread.



Created July 5, 2023, Updated August 8, 2023