ZIP 91770 recorded 116 fire and hazmat incidents in 2025, 658 across 2021–2025. Primary county: Los Angeles County, CA. FEMA NRI rates wildfire risk here as Very High.
658 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 138 | |
| 2022 | 91 | |
| 2023 | 148 | |
| 2024 | 165 | |
| 2025 | 116 |
Aug peaks. Mar dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 91770 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Outside rubbish fire, other | 93 | 14.1% | |
| 2 | Outside rubbish, trash or waste fire | 88 | 13.4% | |
| 3 | Building fires | 68 | 10.3% | |
| 4 | Trash or rubbish fire, contained | 60 | 9.1% | |
| 5 | Power line down | 54 | 8.2% |
For the 10 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 91770 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 23 | 15.5% | |
| 2 | Undetermined | 15 | 10.1% | |
| 3 | Other | 12 | 8.1% | |
| 4 | Vehicle storage area; garage, carport | 9 | 6.1% | |
| 5 | Cooking area, kitchen | 8 | 5.4% | |
| 6 | Vehicle area, other | 8 | 5.4% | |
| 7 | Bedroom - < 5 persons; included are jail or prison | 7 | 4.7% | |
| 8 | Outside area, other | 7 | 4.7% | |
| 9 | All other areas | 59 | 39.9% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Arcing | 31 | 20.9% | |
| 2 | Undetermined | 28 | 18.9% | |
| 3 | Heat source: other | 22 | 14.9% | |
| 4 | Heat from powered equipment, other | 20 | 13.5% | |
| 5 | Hot or smoldering object, other | 11 | 7.4% | |
| 6 | Radiated, conducted heat from operating equipment | 5 | 3.4% | |
| 7 | Heat from other open flame or smoking materials | 5 | 3.4% | |
| 8 | Candle | 5 | 3.4% | |
| 9 | All other sources | 21 | 14.2% |
Largest single-incident losses in ZIP 91770 across 2021–2025. These 8 fires alone account for 305% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $700,000 | Building fires | 2024 | Major |
| 2 | $250,000 | Building fires | 2025 | Major |
| 3 | $200,000 | Building fires | 2023 | Significant |
| 4 | $200,000 | Building fires | 2023 | Significant |
| 5 | $200,000 | Building fires | 2024 | Significant |
| 6 | $200,000 | Building fires | 2024 | Significant |
| 7 | $200,000 | Building fires | 2025 | Significant |
| 8 | $150,000 | Building fires | 2021 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91770.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Rosemead | 584 | |
| 2 | South San Gabriel | 8 | |
| 3 | Montebello | 3 | |
| 4 | Monterey Park | 3 | |
| 5 | El Monte | 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 — 658 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.