Wildfire Zones: Rialto vs Victorville
How do wildfire zones rules compare between Rialto, CA and Victorville, CA?
Rialto has fewer restrictions than Victorville.
Rialto, CA
San Bernardino County
Most of Rialto is in a Local Responsibility Area (LRA) Moderate / Non-VHFHSZ classification, but the northern foothill / Cajon Pass overlay touches CAL FIRE State Responsibility Area (SRA) Very High Fire Hazard Severity Zones (VHFHSZ). Properties within these zones face Cal. Public Resources Code §4291 100-ft. defensible space, Cal. Government Code §51182 vegetation requirements, and Cal. Building Code Chapter 7A WUI construction standards.
View full Rialto rules →Victorville, CA
San Bernardino County
Parts of Victorville fall within or near CAL FIRE Very High Fire Hazard Severity Zones, especially along foothill and desert-wildland interface areas. CBC Chapter 7A and PRC 4291 apply to zoned parcels.
View full Victorville rules →Key Facts Comparison
| Fact | Rialto | Victorville |
|---|---|---|
| Most of city | LRA Moderate / unzoned | - |
| Northern foothill / Cajon Pass | SRA Very High Fire Hazard Severity Zone | - |
| Defensible space | 100 ft. (PRC §4291 / Gov. Code §51182) in VHFHSZ | - |
| New construction in WUI | Cal. Building Code Ch. 7A required | - |
| AB 38 sale disclosure | Required for VHFHSZ properties | - |
| CAL FIRE status | - | VHFHSZ on foothill and WUI fringe |
| Chapter 7A | - | Required in mapped zones |
| PRC 4291 | - | 100-foot defensible space |
| AB 38 | - | Sale disclosure for pre-2010 homes |
| Map check | - | CAL FIRE FHSZ viewer |
Highlighted rows indicate differences between cities.
Rialto FAQ
How do I know if my Rialto property is in a wildfire zone?
Check the official CAL FIRE FHSZ Viewer (osfm.fire.ca.gov/fhsz). Most Rialto urban parcels are LRA Moderate; only northern/foothill parcels near Lytle Creek and the Cajon Pass are SRA VHFHSZ.
What do I have to do if I'm in a VHFHSZ?
Maintain 100 ft. defensible space per PRC §4291, comply with Ch. 7A construction standards for new builds/remodels, and disclose the zone at any sale per AB 38.
Does Rialto Fire inspect for defensible space?
Yes — Rialto Fire conducts annual weed-abatement inspections of all parcels under Mun. Code §15.28.060; CAL FIRE separately inspects SRA parcels for PRC §4291 compliance.
Victorville FAQ
Is my Victorville home in a wildfire zone?
Many Victorville parcels are on the desert floor outside VHFHSZ, but foothill and wildland-interface neighborhoods are mapped. Always verify on the CAL FIRE FHSZ viewer for your specific address.
Do I need Chapter 7A ignition-resistant siding in Victorville?
Only if your parcel is mapped in a Very High Fire Hazard Severity Zone. New construction and major rebuilds in those zones must use Class A roofing, ember-resistant vents, and approved exterior materials.
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