HomeMy WebLinkAboutItem 9 - Fire Hazard Severity Zone2025 Fire Hazard
Severity Zone Maps
Tuesday, June 3, 2025
Fire Hazard Severity Zones
FHSZs were developed by the State of California in response to significant
destructive fires
Purpose: To identify levels of Fire Hazards (Moderate, High, Very High)
Process: The State Fire Marshal completes regional assessments of Fire Hazards,
which reflect current conditions and risk factors
Factors include vegetation, topography, weather, crown fire potential, ember
production and movement
Incorporates the latest scientific methodologies and data
FHSZ Maps
Published by CAL FIRE on March 24, 2025
FHSZ Maps are inclusive of moderate, high, and very high zones
Maps distinguish between State Responsibility Area and Local Responsibility
Area
All local jurisdictions within the local responsibility areas are required to adopt the
State Fire Marshal identified FHSZ maps by ordinance within 120 days of their release
Local jurisdictions are allowed to increase FHSZ designations; decreases are not
permitted
Hazard vs. Risk
Hazard
Based on physical conditions that
create expected fire behavior over a
50-year period
Does not consider short-term
modifications or parcel -specific
modifications
Risk
Potential damage a fire can do to an
area under existing conditions,
including fuel reduction projects,
defensible space, ignition resistant
building construction
Fire Hazard Severity Zones (FHS ) in focal Responsibility
Area (LRA), as Identified by the State Fire Marshal
= Very High High
Moderate
Fire Hazard Severity Zones in State Responsibility
Area (SRA), Effective April 17 2024
Very High
&WA ARA
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FHSZs within Tustin
Zone Type
# of Residential
Parcels
# of Acres
Very High
19223
443
High
110
57
Moderate
97
55
Total
1, 430
555
UNINCORPORATED
ORANGE CO.
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Requirements for the Zones
Parcels in the Very High Zones
Defensible Space within 100 feet of structure
Property Real Estate Disclosures
New Building Compliance with Chapter 7A
CEQA and Subdivision Map Act Review
Parcels in the High Zones
Property Real Estate Disclosures
New Building Compliance with Chapter 7A
Parcels in the Moderate Zones
None
Next Steps
Tonight - Introduce Ordinance No. 1568
June 17, 2025 - Second Reading of Ordinance No. 1568
If adopted, Ordinance No. 1568 will be submitted to the State Board of
Forestry and Fire Protection within 30 days as required by State law