ZIP 94403 recorded 98 fire and hazmat incidents in 2025, 519 across 2021–2025. Primary county: San Mateo County, CA. FEMA NRI rates wildfire risk here as Very High.
519 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 8 | |
| 2022 | 167 | |
| 2023 | 131 | |
| 2024 | 115 | |
| 2025 | 98 |
Jun peaks. Mar dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 94403 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Power line down | 51 | 9.8% | |
| 2 | Gas leak (natural gas or LPG) | 46 | 8.9% | |
| 3 | Electrical wiring/equipment problem, other | 46 | 8.9% | |
| 4 | Cooking fire, confined to container | 37 | 7.1% | |
| 5 | Passenger vehicle fire | 34 | 6.6% |
For the 5 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 94403 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 17 | 22.7% | |
| 2 | Undetermined | 12 | 16.0% | |
| 3 | Cooking area, kitchen | 6 | 8.0% | |
| 4 | Bathroom, checkroom, lavatory, locker room | 6 | 8.0% | |
| 5 | Vehicle area, other | 6 | 8.0% | |
| 6 | Cargo/trunk area - all vehicles | 4 | 5.3% | |
| 7 | Other | 2 | 2.7% | |
| 8 | Bedroom - < 5 persons; included are jail or prison | 2 | 2.7% | |
| 9 | All other areas | 20 | 26.7% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 26 | 34.7% | |
| 2 | Heat from powered equipment, other | 14 | 18.7% | |
| 3 | Heat source: other | 10 | 13.3% | |
| 4 | Radiated, conducted heat from operating equipment | 7 | 9.3% | |
| 5 | Arcing | 4 | 5.3% | |
| 6 | Cigarette | 4 | 5.3% | |
| 7 | Spark, ember or flame from operating equipment | 3 | 4.0% | |
| 8 | Cigarette lighter | 3 | 4.0% | |
| 9 | All other sources | 4 | 5.3% |
Largest single-incident losses in ZIP 94403 across 2021–2025. These 8 fires alone account for 169% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $331,340 | Building fires | 2024 | Major |
| 2 | $296,560 | Building fires | 2025 | Major |
| 3 | $204,012 | Building fires | 2025 | Significant |
| 4 | $182,237 | Building fires | 2025 | Significant |
| 5 | $100,000 | Building fires | 2022 | Significant |
| 6 | $80,000 | Mobile property (vehicle) fire, other | 2022 | Significant |
| 7 | $66,268 | Building fires | 2024 | Significant |
| 8 | $50,415 | Building fires | 2024 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 94403.
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 — 519 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.