ZIP 85637 recorded 42 fire and hazmat incidents in 2025, 246 across 2021–2025. Primary county: Pima County, AZ. FEMA NRI rates wildfire risk here as Very High.
246 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 54 | |
| 2022 | 59 | |
| 2023 | 54 | |
| 2024 | 37 | |
| 2025 | 42 |
Mar peaks. May dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 85637 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Authorized controlled burning | 138 | 56.1% | |
| 2 | Brush, or brush and grass mixture fire | 31 | 12.6% | |
| 3 | Grass fire | 13 | 5.3% | |
| 4 | Forest, woods or wildland fire | 10 | 4.1% | |
| 5 | Building fires | 6 | 2.4% |
For the 3 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 85637 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Wildland, woods | 10 | 18.5% | |
| 2 | Outside area, other | 9 | 16.7% | |
| 3 | Open area - outside; included are farmland, field | 8 | 14.8% | |
| 4 | Highway, parking lot, street: on or near | 7 | 13.0% | |
| 5 | Undetermined | 5 | 9.3% | |
| 6 | Other | 3 | 5.6% | |
| 7 | Engine area, running gear, wheel area | 3 | 5.6% | |
| 8 | Cargo/trunk area - all vehicles | 2 | 3.7% | |
| 9 | All other areas | 7 | 13.0% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 22 | 40.7% | |
| 2 | Lightning | 6 | 11.1% | |
| 3 | Hot ember or ash | 5 | 9.3% | |
| 4 | Heat from powered equipment, other | 3 | 5.6% | |
| 5 | Arcing | 3 | 5.6% | |
| 6 | Cigarette | 3 | 5.6% | |
| 7 | Heat source: other | 2 | 3.7% | |
| 8 | Spark, ember or flame from operating equipment | 2 | 3.7% | |
| 9 | All other sources | 8 | 14.8% |
Largest single-incident losses in ZIP 85637 across 2021–2025. These 8 fires alone account for 103% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $795,423 | Building fires | 2025 | Major |
| 2 | $10,000 | Forest, woods or wildland fire | 2022 | Significant |
| 3 | $10,000 | Brush, or brush and grass mixture fire | 2023 | Significant |
| 4 | $5,000 | Mobile property (vehicle) fire, other | 2024 | Significant |
| 5 | $1,000 | Grass fire | 2023 | Significant |
| 6 | $1,000 | Passenger vehicle fire | 2025 | Significant |
| 7 | $1 | Brush, or brush and grass mixture fire | 2023 | Significant |
| 8 | $1 | Forest, woods or wildland fire | 2023 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 85637.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Sonoita | 227 |
Some ZIPs span multiple counties. The primary above is the largest by population weight; secondary counties are below.
| County | State | Weight | |
|---|---|---|---|
| Santa Cruz County | AZ | 1.00 | FIPS 04023 |
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 — 246 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.