Fire Hazard Severity Zone

Fire Hazard Severity Zones (FHSZ) are areas identified by CAL FIRE as having varying levels of wildfire risk based on factors such as vegetation, terrain, weather, and fire history.

Zones are classified as:

• Moderate
• High
• Very High

These designations are used for planning, building standards, and public safety efforts.

In 2025, CAL FIRE updated Fire Hazard Severity Zone maps across California using improved data and modeling.

In Sierra Madre, some areas, particularly in foothill and canyon regions that are now designated as Very High Fire Hazard Severity Zones.

For Sierra Madre residents, the updated Fire Hazard Severity Zone (FHSZ) maps may affect homeownership, insurance, and overall wildfire preparedness. Properties located within newly designated High or Very High hazard zones may be subject to stricter building code enforcement, particularly under California’s Wildland-Urban Interface (WUI) regulations.

Homes located in Very High Fire Hazard Severity Zones are required to maintain at least 100 feet of defensible space around structures. This requirement is enforced locally and may involve periodic inspections or citations for non-compliance. Sellers are also legally required to disclose a property’s fire hazard classification during real estate transactions, which may influence buyer decisions and resale value.
Learn more about Defensible Space and Home Hardening.

While CAL FIRE’s Fire Hazard Severity Zone maps are not used directly by insurance companies to calculate wildfire risk, many insurers reference similar data or fire zone classifications when determining coverage eligibility or premiums. As a result, some homeowners in High or Very High hazard zones may experience higher insurance rates, stricter policy terms, or referral to the California FAIR Plan for limited fire coverage. Insurance FAQs

These updated maps also help guide the City’s evacuation planning, zoning decisions, and eligibility for hazard mitigation grants. Public awareness and preparedness remain critical to building a more fire-resilient Sierra Madre.

If your property is located in a Very High Fire Hazard Severity Zone:

• You may be subject to additional fire-safe construction standards for new builds or significant renovations
• Defensible space requirements may apply
• The City will provide advance notice of any local ordinance changes

Fire Hazard Severity Zone designations are set by the State of California.

Insurance requirements are determined by individual insurance providers, not the City. Residents with questions about coverage should contact their insurance agent directly.