ZIP 51109 recorded 21 fire and hazmat incidents in 2025, 107 across 2021–2025. Primary county: Woodbury County, IA. FEMA NRI rates wildfire risk here as Very High.
107 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 16 | |
| 2022 | 21 | |
| 2023 | 24 | |
| 2024 | 25 | |
| 2025 | 21 |
Mar peaks. Feb dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 51109 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Unauthorized burning | 32 | 29.9% | |
| 2 | Building fires | 20 | 18.7% | |
| 3 | Passenger vehicle fire | 8 | 7.5% | |
| 4 | Carbon monoxide incident | 7 | 6.5% | |
| 5 | Outside rubbish, trash or waste fire | 6 | 5.6% |
For the 2 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 51109 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 9 | 22.0% | |
| 2 | Engine area, running gear, wheel area | 6 | 14.6% | |
| 3 | Vehicle storage area; garage, carport | 3 | 7.3% | |
| 4 | Function area, other | 2 | 4.9% | |
| 5 | Bedroom - < 5 persons; included are jail or prison | 2 | 4.9% | |
| 6 | Ceiling & floor assembly, crawl space b/t stories | 2 | 4.9% | |
| 7 | Wall surface: exterior | 2 | 4.9% | |
| 8 | Exterior, exposed surface | 2 | 4.9% | |
| 9 | All other areas | 13 | 31.7% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 19 | 46.3% | |
| 2 | Hot or smoldering object, other | 5 | 12.2% | |
| 3 | Arcing | 2 | 4.9% | |
| 4 | Fireworks | 2 | 4.9% | |
| 5 | Cigarette | 2 | 4.9% | |
| 6 | Cigarette lighter | 2 | 4.9% | |
| 7 | Chemical reaction | 2 | 4.9% | |
| 8 | Heat from direct flame, convection currents | 2 | 4.9% | |
| 9 | All other sources | 5 | 12.2% |
Largest single-incident losses in ZIP 51109 across 2021–2025. These 8 fires alone account for 436% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $65,000 | Passenger vehicle fire | 2023 | Significant |
| 2 | $40,000 | Building fires | 2022 | Significant |
| 3 | $25,000 | Building fires | 2025 | Significant |
| 4 | $20,000 | Passenger vehicle fire | 2023 | Significant |
| 5 | $20,000 | Building fires | 2024 | Significant |
| 6 | $20,000 | Building fires | 2024 | Significant |
| 7 | $15,000 | Building fires | 2024 | Significant |
| 8 | $15,000 | Building fires | 2024 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 51109.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Sioux City | 107 |
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 — 107 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.