Local Responsibility Area (LRA) Fire Hazard Severity Zone Update (FHSZ)
Understanding Fire Hazard Severity Zones
Wildfire risk is a major concern in California, and the Office of the State Fire Marshal has updated the 2025 Fire Hazard Severity Zone (FHSZ) maps for Local Responsibility Areas (LRA), including the City of Rosemead. These updates use the latest fire science to classify areas as Moderate, High, or Very High risk, based on vegetation, terrain, and wind patterns. (As mandated by Government Code 51178).
Understanding these designations helps residents and property owners take proactive steps for fire prevention, home protection, and emergency preparedness.
By identifying these zones, the State Fire Marshal provides guidance for:
- Building and fire codes- to enhance safety.
- Homeowners and businesses - to take proactive fire prevention measures.
- Emergency Preparedness and Evacuation Planning – to understand your fire hazard risk, helps you take proactive steps to protect your home, family, and community.
Fire Hazard Severity Zone Map for City of Rosemead
To help residents and property owners understand their wildfire risk, please click here to preview the updated 2025 Fire Hazard Severity Zone Map for the City of Rosemead.
How Fire Hazard Severity Zones Are Determined
The State Fire Marshal uses a scientific and data-driven approach to classify fire hazard zones. Key factors include:
- Vegetation and Fuel Loading – Areas with dense brush, dry grass, or heavy forests have a higher risk.
- Terrain and Slope – Fires spread faster uphill, making steeper areas more hazardous.
- Weather and Wind Patterns – Frequent high winds, low humidity, and extreme heat contributes to wildfire.
- Historical Wildfire Data – Past wildfire activity is analyzed to predict future risks.
Additional Resources
Office of State Fire Marshall
Local Responsibility Area Legislation Factsheet Flipbook
City of Rosemead Fire Hazard Severity Zone PDF Map
Public Comment and General Questions
The City of Rosemead is open to public comment about the Fire Hazard Severity Zone Maps. Questions and/or comments to be submitted to Mandy Wong, Public Safety Supervisor, at [email protected].