ZIP 95421 recorded 24 fire and hazmat incidents in 2025, 152 across 2021–2025. Primary county: Sonoma County, CA. FEMA NRI rates wildfire risk here as Very High.
152 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 28 | |
| 2022 | 39 | |
| 2023 | 31 | |
| 2024 | 30 | |
| 2025 | 24 |
Dec peaks. May dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 95421 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Hazardous condition, other | 69 | 45.4% | |
| 2 | Forest, woods or wildland fire | 20 | 13.2% | |
| 3 | Natural vegetation fire, other | 11 | 7.2% | |
| 4 | Grass fire | 8 | 5.3% | |
| 5 | Authorized controlled burning | 7 | 4.6% |
For the 1 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 95421 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Outside area, other | 5 | 33.3% | |
| 2 | Undetermined | 4 | 26.7% | |
| 3 | Other | 2 | 13.3% | |
| 4 | Open area - outside; included are farmland, field | 2 | 13.3% | |
| 5 | Wildland, woods | 2 | 13.3% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 5 | 33.3% | |
| 2 | Heat source: other | 4 | 26.7% | |
| 3 | Arcing | 2 | 13.3% | |
| 4 | Hot ember or ash | 2 | 13.3% | |
| 5 | Hot or smoldering object, other | 1 | 6.7% | |
| 6 | Incendiary device | 1 | 6.7% |
Largest single-incident losses in ZIP 95421 across 2021–2025. These 5 fires alone account for 0% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,025,000 | Natural vegetation fire, other | 2023 | Major |
| 2 | $50,000 | Building fires | 2022 | Significant |
| 3 | $50,000 | Forest, woods or wildland fire | 2022 | Significant |
| 4 | $10,000 | Brush, or brush and grass mixture fire | 2024 | Significant |
| 5 | $500 | Forest, woods or wildland fire | 2021 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 95421.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Monte Rio | 1 |
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 — 152 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.