ZIP 94528 recorded 3 fire and hazmat incidents in 2025, 24 across 2021–2025. Primary county: Contra Costa County, CA. FEMA NRI rates wildfire risk here as Very High.
24 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 1 | |
| 2022 | 5 | |
| 2023 | 5 | |
| 2024 | 10 | |
| 2025 | 3 |
Jan peaks. Apr dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 94528 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Hazardous condition, other | 8 | 33.3% | |
| 2 | Gas leak (natural gas or LPG) | 4 | 16.7% | |
| 3 | Special outside fire, other | 2 | 8.3% | |
| 4 | Fire, other | 1 | 4.2% | |
| 5 | Building fires | 1 | 4.2% |
For the 0 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 94528 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 2 | 33.3% | |
| 2 | Function area, other | 1 | 16.7% | |
| 3 | Operator/passenger area of transportation equip. | 1 | 16.7% | |
| 4 | Courtyard, patio, porch, terrace | 1 | 16.7% | |
| 5 | Vacant structural area | 1 | 16.7% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Heat from powered equipment, other | 2 | 33.3% | |
| 2 | Undetermined | 2 | 33.3% | |
| 3 | Heat source: other | 1 | 16.7% | |
| 4 | Arcing | 1 | 16.7% |
Largest single-incident losses in ZIP 94528 across 2021–2025. These 4 fires alone account for 0% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $60,000 | Building fires | 2023 | Significant |
| 2 | $25,000 | Special outside fire, other | 2024 | Significant |
| 3 | $10,000 | Mobile property (vehicle) fire, other | 2024 | Significant |
| 4 | $4,000 | Fire, other | 2024 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 94528.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Diablo | 22 |
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 — 24 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.