ZIP 91977 recorded 220 fire and hazmat incidents in 2025, 1,022 across 2021–2025. Primary county: San Diego County, CA. FEMA NRI rates wildfire risk here as Very High.
1,022 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 204 | |
| 2022 | 225 | |
| 2023 | 172 | |
| 2024 | 201 | |
| 2025 | 220 |
Jan peaks. Sep dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 91977 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Outside rubbish fire, other | 176 | 17.2% | |
| 2 | Building fires | 144 | 14.1% | |
| 3 | Outside rubbish, trash or waste fire | 67 | 6.6% | |
| 4 | Unauthorized burning | 67 | 6.6% | |
| 5 | Passenger vehicle fire | 58 | 5.7% |
For the 20 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 91977 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 72 | 23.3% | |
| 2 | Outside area, other | 50 | 16.2% | |
| 3 | Engine area, running gear, wheel area | 34 | 11.0% | |
| 4 | Cooking area, kitchen | 30 | 9.7% | |
| 5 | Vehicle storage area; garage, carport | 16 | 5.2% | |
| 6 | Chute/container - trash, rubbish, waste | 12 | 3.9% | |
| 7 | Other | 11 | 3.6% | |
| 8 | Function area, other | 9 | 2.9% | |
| 9 | All other areas | 75 | 24.3% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 214 | 69.3% | |
| 2 | Heat from powered equipment, other | 20 | 6.5% | |
| 3 | Heat source: other | 17 | 5.5% | |
| 4 | Radiated, conducted heat from operating equipment | 10 | 3.2% | |
| 5 | Hot ember or ash | 10 | 3.2% | |
| 6 | Cigarette lighter | 6 | 1.9% | |
| 7 | Flame/torch used for lighting | 5 | 1.6% | |
| 8 | Spark, ember or flame from operating equipment | 4 | 1.3% | |
| 9 | All other sources | 23 | 7.4% |
Largest single-incident losses in ZIP 91977 across 2021–2025. These 8 fires alone account for 163% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $2,000,000 | Building fires | 2025 | Major |
| 2 | $1,040,000 | Building fires | 2023 | Major |
| 3 | $1,000,000 | Building fires | 2024 | Major |
| 4 | $900,000 | Outside storage fire | 2024 | Major |
| 5 | $900,000 | Fires in structures other than in a building | 2025 | Major |
| 6 | $850,000 | Building fires | 2022 | Major |
| 7 | $800,000 | Dumpster or other outside trash receptacle fire | 2023 | Major |
| 8 | $800,000 | Building fires | 2025 | Major |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 91977.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Spring Valley | 606 | |
| 2 | San Miguel | 277 | |
| 3 | National City | 6 | |
| 4 | Lemon Grove | 4 | |
| 5 | Chula Vista | 3 |
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 — 1,022 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.