ZIP 91739 recorded 108 fire and hazmat incidents in 2025, 571 across 2021–2025. Primary county: San Bernardino County, CA. FEMA NRI rates wildfire risk here as Very High.
571 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 107 | |
| 2022 | 129 | |
| 2023 | 113 | |
| 2024 | 114 | |
| 2025 | 108 |
Nov peaks. Feb dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 91739 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Passenger vehicle fire | 64 | 11.2% | |
| 2 | Outside rubbish, trash or waste fire | 45 | 7.9% | |
| 3 | Gas leak (natural gas or LPG) | 37 | 6.5% | |
| 4 | Brush, or brush and grass mixture fire | 35 | 6.1% | |
| 5 | Building fires | 33 | 5.8% |
For the 6 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 91739 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 54 | 35.8% | |
| 2 | Undetermined | 16 | 10.6% | |
| 3 | Outside area, other | 12 | 7.9% | |
| 4 | Cooking area, kitchen | 7 | 4.6% | |
| 5 | Cargo/trunk area - all vehicles | 6 | 4.0% | |
| 6 | Chute/container - trash, rubbish, waste | 5 | 3.3% | |
| 7 | Laundry area, wash house (laundry) | 4 | 2.6% | |
| 8 | Vehicle storage area; garage, carport | 4 | 2.6% | |
| 9 | All other areas | 43 | 28.5% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 67 | 44.4% | |
| 2 | Radiated, conducted heat from operating equipment | 13 | 8.6% | |
| 3 | Heat source: other | 12 | 7.9% | |
| 4 | Heat from powered equipment, other | 12 | 7.9% | |
| 5 | Arcing | 9 | 6.0% | |
| 6 | Spark, ember or flame from operating equipment | 5 | 3.3% | |
| 7 | Radiated heat from another fire | 5 | 3.3% | |
| 8 | Hot or smoldering object, other | 4 | 2.6% | |
| 9 | All other sources | 24 | 15.9% |
Largest single-incident losses in ZIP 91739 across 2021–2025. These 8 fires alone account for 442% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,015,400 | Building fires | 2022 | Major |
| 2 | $321,000 | Building fires | 2025 | Major |
| 3 | $250,000 | Building fires | 2023 | Major |
| 4 | $225,000 | Passenger vehicle fire | 2024 | Significant |
| 5 | $200,000 | Building fires | 2023 | Significant |
| 6 | $150,000 | Building fires | 2023 | Significant |
| 7 | $100,000 | Fires in structures other than in a building | 2023 | Significant |
| 8 | $100,000 | Building fires | 2024 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91739.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Rancho Cucamonga | 214 | |
| 2 | Ontario | 9 | |
| 3 | Fontana | 1 |
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 — 571 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.