ZIP 91761 recorded 333 fire and hazmat incidents in 2025, 2,221 across 2021–2025. Primary county: San Bernardino County, CA. FEMA NRI rates wildfire risk here as Very High.
2,221 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 497 | |
| 2022 | 492 | |
| 2023 | 453 | |
| 2024 | 446 | |
| 2025 | 333 |
Jul peaks. Feb dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 91761 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Outside rubbish, trash or waste fire | 397 | 17.9% | |
| 2 | Passenger vehicle fire | 223 | 10.0% | |
| 3 | Chemical hazard (no spill or leak) | 188 | 8.5% | |
| 4 | Outside rubbish fire, other | 117 | 5.3% | |
| 5 | Dumpster or other outside trash receptacle fire | 115 | 5.2% |
For the 9 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 91761 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 181 | 25.4% | |
| 2 | Undetermined | 148 | 20.7% | |
| 3 | Outside area, other | 38 | 5.3% | |
| 4 | Open area - outside; included are farmland, field | 37 | 5.2% | |
| 5 | Operator/passenger area of transportation equip. | 30 | 4.2% | |
| 6 | Chute/container - trash, rubbish, waste | 25 | 3.5% | |
| 7 | Cooking area, kitchen | 21 | 2.9% | |
| 8 | Vehicle storage area; garage, carport | 21 | 2.9% | |
| 9 | All other areas | 213 | 29.8% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 424 | 59.4% | |
| 2 | Heat from powered equipment, other | 61 | 8.5% | |
| 3 | Radiated, conducted heat from operating equipment | 42 | 5.9% | |
| 4 | Arcing | 21 | 2.9% | |
| 5 | Cigarette lighter | 19 | 2.7% | |
| 6 | Heat source: other | 17 | 2.4% | |
| 7 | Spark, ember or flame from operating equipment | 16 | 2.2% | |
| 8 | Chemical reaction | 13 | 1.8% | |
| 9 | All other sources | 101 | 14.1% |
Largest single-incident losses in ZIP 91761 across 2021–2025. These 8 fires alone account for 600% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $240,000 | Mobile property (vehicle) fire, other | 2022 | Significant |
| 2 | $100,000 | Building fires | 2021 | Significant |
| 3 | $100,000 | Building fires | 2024 | Significant |
| 4 | $100,000 | Building fires | 2025 | Significant |
| 5 | $25,000 | Passenger vehicle fire | 2021 | Significant |
| 6 | $25,000 | Passenger vehicle fire | 2024 | Significant |
| 7 | $20,000 | Building fires | 2021 | Significant |
| 8 | $20,000 | Outside stationary compactor/compacted trash fire | 2021 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91761.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Ontario | 2,210 | |
| 2 | Eastvale | 4 | |
| 3 | Chino | 3 | |
| 4 | Fontana | 2 | |
| 5 | Jurupa Valley | 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 — 2,221 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.