ZIP 91786 recorded 83 fire and hazmat incidents in 2025, 724 across 2021–2025. Primary county: San Bernardino County, CA. FEMA NRI rates wildfire risk here as Very High.
724 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 153 | |
| 2022 | 174 | |
| 2023 | 177 | |
| 2024 | 137 | |
| 2025 | 83 |
Jul peaks. Dec dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 91786 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Electrical wiring/equipment problem, other | 88 | 12.2% | |
| 2 | Building fires | 79 | 10.9% | |
| 3 | Power line down | 65 | 9.0% | |
| 4 | Outside rubbish, trash or waste fire | 59 | 8.1% | |
| 5 | Passenger vehicle fire | 53 | 7.3% |
For the 4 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 91786 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 48 | 30.4% | |
| 2 | Engine area, running gear, wheel area | 37 | 23.4% | |
| 3 | Cooking area, kitchen | 10 | 6.3% | |
| 4 | Vehicle area, other | 6 | 3.8% | |
| 5 | Other | 4 | 2.5% | |
| 6 | Bathroom, checkroom, lavatory, locker room | 4 | 2.5% | |
| 7 | Attic: vacant, crawl space above top story, cupola | 4 | 2.5% | |
| 8 | Common room, den, family room, living room, lounge | 3 | 1.9% | |
| 9 | All other areas | 42 | 26.6% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 92 | 58.2% | |
| 2 | Arcing | 13 | 8.2% | |
| 3 | Heat from powered equipment, other | 12 | 7.6% | |
| 4 | Heat source: other | 8 | 5.1% | |
| 5 | Spark, ember or flame from operating equipment | 6 | 3.8% | |
| 6 | Radiated, conducted heat from operating equipment | 5 | 3.2% | |
| 7 | Hot or smoldering object, other | 3 | 1.9% | |
| 8 | Heat, spark from friction | 3 | 1.9% | |
| 9 | All other sources | 16 | 10.1% |
Largest single-incident losses in ZIP 91786 across 2021–2025. These 8 fires alone account for 17015% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $2,000,000 | Building fires | 2021 | Major |
| 2 | $2,000,000 | Building fires | 2021 | Major |
| 3 | $1,000,000 | Building fires | 2021 | Major |
| 4 | $800,000 | Building fires | 2021 | Major |
| 5 | $750,000 | Building fires | 2021 | Major |
| 6 | $750,000 | Aircraft fire | 2023 | Major |
| 7 | $550,000 | Building fires | 2022 | Major |
| 8 | $300,000 | Building fires | 2022 | Major |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91786.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Upland | 617 | |
| 2 | Montclair | 5 | |
| 3 | Claremont | 1 | |
| 4 | San Bernardino | 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 — 724 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.