ZIP 91737 recorded 53 fire and hazmat incidents in 2025, 267 across 2021–2025. Primary county: San Bernardino County, CA. FEMA NRI rates wildfire risk here as Very High.
267 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 54 | |
| 2022 | 56 | |
| 2023 | 48 | |
| 2024 | 56 | |
| 2025 | 53 |
Jul peaks. Nov dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 91737 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Passenger vehicle fire | 33 | 12.4% | |
| 2 | Gas leak (natural gas or LPG) | 24 | 9.0% | |
| 3 | Carbon monoxide incident | 19 | 7.1% | |
| 4 | Electrical wiring/equipment problem, other | 18 | 6.7% | |
| 5 | Brush, or brush and grass mixture fire | 15 | 5.6% |
For the 0 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 91737 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 26 | 38.2% | |
| 2 | Undetermined | 15 | 22.1% | |
| 3 | Vehicle storage area; garage, carport | 4 | 5.9% | |
| 4 | Outside area, other | 4 | 5.9% | |
| 5 | Bathroom, checkroom, lavatory, locker room | 3 | 4.4% | |
| 6 | Storage: supplies or tools; dead storage | 2 | 2.9% | |
| 7 | Courtyard, patio, porch, terrace | 2 | 2.9% | |
| 8 | Other | 1 | 1.5% | |
| 9 | All other areas | 11 | 16.2% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 39 | 57.4% | |
| 2 | Heat from powered equipment, other | 7 | 10.3% | |
| 3 | Spark, ember or flame from operating equipment | 5 | 7.4% | |
| 4 | Radiated, conducted heat from operating equipment | 3 | 4.4% | |
| 5 | Arcing | 3 | 4.4% | |
| 6 | Heat source: other | 2 | 2.9% | |
| 7 | Hot or smoldering object, other | 2 | 2.9% | |
| 8 | Heat, spark from friction | 1 | 1.5% | |
| 9 | All other sources | 6 | 8.8% |
Largest single-incident losses in ZIP 91737 across 2021–2025. These 8 fires alone account for 25983% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $200,000 | Building fires | 2022 | Significant |
| 2 | $60,000 | Camper or recreational vehicle (RV) fire | 2021 | Significant |
| 3 | $30,000 | Passenger vehicle fire | 2022 | Significant |
| 4 | $30,000 | Passenger vehicle fire | 2023 | Significant |
| 5 | $25,000 | Passenger vehicle fire | 2022 | Significant |
| 6 | $25,000 | Building fires | 2024 | Significant |
| 7 | $24,000 | Passenger vehicle fire | 2023 | Significant |
| 8 | $22,500 | Passenger vehicle fire | 2023 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91737.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Rancho Cucamonga | 102 |
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
NFIRS reports each fire incident with a 5-digit address ZIP. We aggregate those rows directly to produce ZIP-level totals — 267 incidents in this ZIP across 2021–2025. Building-fire breakdowns (Area of Origin, Heat Source, ignition cause) only count fires investigators classified beyond the basic incident report. Because NFIRS reporting is voluntary, totals are a strong indicator rather than a complete census.