ZIP 94303 recorded 109 fire and hazmat incidents in 2025, 696 across 2021–2025. Primary county: San Mateo County, CA. FEMA NRI rates wildfire risk here as Very High.
696 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 82 | |
| 2022 | 139 | |
| 2023 | 203 | |
| 2024 | 163 | |
| 2025 | 109 |
Feb peaks. Sep dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 94303 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Power line down | 81 | 11.6% | |
| 2 | Outside rubbish, trash or waste fire | 72 | 10.3% | |
| 3 | Hazardous condition, other | 71 | 10.2% | |
| 4 | Electrical wiring/equipment problem, other | 48 | 6.9% | |
| 5 | Building fires | 47 | 6.8% |
For the 16 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 94303 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 25 | 17.0% | |
| 2 | Undetermined | 23 | 15.6% | |
| 3 | Open area - outside; included are farmland, field | 14 | 9.5% | |
| 4 | Operator/passenger area of transportation equip. | 9 | 6.1% | |
| 5 | Engine area, running gear, wheel area | 9 | 6.1% | |
| 6 | Cooking area, kitchen | 8 | 5.4% | |
| 7 | Vehicle area, other | 8 | 5.4% | |
| 8 | Cargo/trunk area - all vehicles | 6 | 4.1% | |
| 9 | All other areas | 45 | 30.6% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 72 | 49.0% | |
| 2 | Heat source: other | 20 | 13.6% | |
| 3 | Heat from powered equipment, other | 13 | 8.8% | |
| 4 | Arcing | 9 | 6.1% | |
| 5 | Hot or smoldering object, other | 5 | 3.4% | |
| 6 | Hot ember or ash | 5 | 3.4% | |
| 7 | Heat from other open flame or smoking materials | 3 | 2.0% | |
| 8 | Cigarette lighter | 3 | 2.0% | |
| 9 | All other sources | 17 | 11.6% |
Largest single-incident losses in ZIP 94303 across 2021–2025. These 8 fires alone account for 207% 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 | 2022 | Major |
| 3 | $600,000 | Building fires | 2023 | Major |
| 4 | $400,000 | Building fires | 2022 | Major |
| 5 | $250,000 | Building fires | 2025 | Major |
| 6 | $150,000 | Building fires | 2024 | Significant |
| 7 | $150,000 | Building fires | 2025 | Significant |
| 8 | $120,000 | Building fires | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 94303.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | East Palo Alto | 224 | |
| 2 | Palo Alto | 147 | |
| 3 | Menlo Park | 4 | |
| 4 | Stanford | 1 |
Some ZIPs span multiple counties. The primary above is the largest by population weight; secondary counties are below.
| County | State | Weight | |
|---|---|---|---|
| Santa Clara County | CA | 1.00 | FIPS 06085 |
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 — 696 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.