Glossary / Fire Hazard Severity Zone

Fire Hazard Severity Zone

California maps Moderate, High, and Very High Fire Hazard Severity Zones. The maps measure hazard, not risk. They are not Oregon R327 and not an insurance rate map.

Last verified 2026-08-23. JSON (CC BY 4.0)

Also called: FHSZ, VHFHSZ.

Do not use as a synonym: fire risk map.

Related

• wui
• cwuic
• zone 0
• cwuic
• How to read a CAL FIRE FHSZ map
• Oregon R327 versus California CWUIC

Where this term is used

13 guides use this term.

• California AB 38 seller disclosure
• Colorado CWRC versus Oregon R327 versus California CWUIC
• Home ignitability
• How the WUI is mapped
• How to read a CAL FIRE FHSZ map
• One road out
• Oregon R327 versus California CWUIC
• Oregon wildfire disclosure

All guides →