ZIP 91764 recorded 242 fire and hazmat incidents in 2025, 1,364 across 2021–2025. Primary county: San Bernardino County, CA. FEMA NRI rates wildfire risk here as Very High.
1,364 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 335 | |
| 2022 | 292 | |
| 2023 | 228 | |
| 2024 | 267 | |
| 2025 | 242 |
Jul peaks. Sep dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 91764 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Outside rubbish, trash or waste fire | 367 | 26.9% | |
| 2 | Passenger vehicle fire | 103 | 7.6% | |
| 3 | Dumpster or other outside trash receptacle fire | 81 | 5.9% | |
| 4 | Electrical wiring/equipment problem, other | 80 | 5.9% | |
| 5 | Building fires | 72 | 5.3% |
For the 15 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 91764 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 73 | 21.2% | |
| 2 | Undetermined | 55 | 15.9% | |
| 3 | Outside area, other | 22 | 6.4% | |
| 4 | Highway, parking lot, street: on or near | 21 | 6.1% | |
| 5 | Cooking area, kitchen | 20 | 5.8% | |
| 6 | Open area - outside; included are farmland, field | 16 | 4.6% | |
| 7 | Chute/container - trash, rubbish, waste | 14 | 4.1% | |
| 8 | Exterior, exposed surface | 13 | 3.8% | |
| 9 | All other areas | 111 | 32.2% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 179 | 51.9% | |
| 2 | Heat from powered equipment, other | 28 | 8.1% | |
| 3 | Radiated, conducted heat from operating equipment | 28 | 8.1% | |
| 4 | Cigarette lighter | 23 | 6.7% | |
| 5 | Heat from other open flame or smoking materials | 12 | 3.5% | |
| 6 | Heat from direct flame, convection currents | 11 | 3.2% | |
| 7 | Arcing | 9 | 2.6% | |
| 8 | Spark, ember or flame from operating equipment | 8 | 2.3% | |
| 9 | All other sources | 47 | 13.6% |
Largest single-incident losses in ZIP 91764 across 2021–2025. These 8 fires alone account for 1600% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,600,000 | Fires in structures other than in a building | 2024 | Major |
| 2 | $100,000 | Building fires | 2025 | Significant |
| 3 | $50,000 | Building fires | 2022 | Significant |
| 4 | $10,000 | Building fires | 2021 | Significant |
| 5 | $10,000 | Passenger vehicle fire | 2025 | Significant |
| 6 | $5,000 | Passenger vehicle fire | 2021 | Significant |
| 7 | $1,000 | Fire, other | 2025 | Significant |
| 8 | $500 | Passenger vehicle fire | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91764.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Ontario | 1,353 | |
| 2 | Rancho Cucamonga | 2 | |
| 3 | Upland | 2 | |
| 4 | 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 — 1,364 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.