ZIP 91709 recorded 130 fire and hazmat incidents in 2025, 548 across 2021–2025. Primary county: San Bernardino County, CA. FEMA NRI rates wildfire risk here as Very High.
548 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 91 | |
| 2022 | 105 | |
| 2023 | 111 | |
| 2024 | 111 | |
| 2025 | 130 |
Oct peaks. Sep dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 91709 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Electrical wiring/equipment problem, other | 49 | 8.9% | |
| 2 | Carbon monoxide incident | 48 | 8.8% | |
| 3 | Gas leak (natural gas or LPG) | 44 | 8.0% | |
| 4 | Cooking fire, confined to container | 40 | 7.3% | |
| 5 | Building fires | 38 | 6.9% |
For the 14 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 91709 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 37 | 28.5% | |
| 2 | Undetermined | 17 | 13.1% | |
| 3 | Cooking area, kitchen | 8 | 6.2% | |
| 4 | Vehicle storage area; garage, carport | 8 | 6.2% | |
| 5 | Outside area, other | 7 | 5.4% | |
| 6 | Bedroom - < 5 persons; included are jail or prison | 6 | 4.6% | |
| 7 | Storage area, other | 4 | 3.1% | |
| 8 | Vehicle area, other | 4 | 3.1% | |
| 9 | All other areas | 39 | 30.0% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 42 | 32.3% | |
| 2 | Heat from powered equipment, other | 30 | 23.1% | |
| 3 | Arcing | 12 | 9.2% | |
| 4 | Heat source: other | 11 | 8.5% | |
| 5 | Hot or smoldering object, other | 10 | 7.7% | |
| 6 | Radiated, conducted heat from operating equipment | 5 | 3.8% | |
| 7 | Spark, ember or flame from operating equipment | 4 | 3.1% | |
| 8 | Heat, spark from friction | 4 | 3.1% | |
| 9 | All other sources | 12 | 9.2% |
Largest single-incident losses in ZIP 91709 across 2021–2025. These 8 fires alone account for 229% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,000,000 | Building fires | 2025 | Major |
| 2 | $700,000 | Building fires | 2021 | Major |
| 3 | $400,000 | Fires in structures other than in a building | 2023 | Major |
| 4 | $300,000 | Building fires | 2022 | Major |
| 5 | $250,000 | Building fires | 2022 | Major |
| 6 | $200,000 | Building fires | 2022 | Significant |
| 7 | $100,000 | Fire in mobile home used as fixed residence | 2025 | Significant |
| 8 | $60,000 | Passenger vehicle fire | 2021 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91709.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Chino Hills | 528 | |
| 2 | Chino | 7 | |
| 3 | Pomona | 2 |
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 — 548 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.