ZIP 51104 recorded 109 fire and hazmat incidents in 2025, 492 across 2021–2025. Primary county: Woodbury County, IA. FEMA NRI rates wildfire risk here as Very High.
492 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 102 | |
| 2022 | 84 | |
| 2023 | 69 | |
| 2024 | 128 | |
| 2025 | 109 |
Jul peaks. Feb dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 51104 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Unauthorized burning | 129 | 26.2% | |
| 2 | Power line down | 54 | 11.0% | |
| 3 | Carbon monoxide incident | 41 | 8.3% | |
| 4 | Gas leak (natural gas or LPG) | 38 | 7.7% | |
| 5 | Building fires | 31 | 6.3% |
For the 6 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 51104 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Engine area, running gear, wheel area | 14 | 13.2% | |
| 2 | Undetermined | 14 | 13.2% | |
| 3 | Cooking area, kitchen | 12 | 11.3% | |
| 4 | Open area - outside; included are farmland, field | 11 | 10.4% | |
| 5 | Vehicle storage area; garage, carport | 9 | 8.5% | |
| 6 | Chute/container - trash, rubbish, waste | 6 | 5.7% | |
| 7 | Operator/passenger area of transportation equip. | 4 | 3.8% | |
| 8 | Outside area, other | 4 | 3.8% | |
| 9 | All other areas | 32 | 30.2% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 44 | 41.5% | |
| 2 | Heat from other open flame or smoking materials | 8 | 7.5% | |
| 3 | Heat from powered equipment, other | 7 | 6.6% | |
| 4 | Radiated, conducted heat from operating equipment | 7 | 6.6% | |
| 5 | Hot or smoldering object, other | 7 | 6.6% | |
| 6 | Arcing | 6 | 5.7% | |
| 7 | Fireworks | 5 | 4.7% | |
| 8 | Cigarette lighter | 5 | 4.7% | |
| 9 | All other sources | 17 | 16.0% |
Largest single-incident losses in ZIP 51104 across 2021–2025. These 8 fires alone account for 546% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $939,600 | Building fires | 2022 | Major |
| 2 | $60,000 | Building fires | 2025 | Significant |
| 3 | $50,000 | Mobile property (vehicle) fire, other | 2022 | Significant |
| 4 | $50,000 | Building fires | 2023 | Significant |
| 5 | $50,000 | Building fires | 2025 | Significant |
| 6 | $40,000 | Building fires | 2023 | Significant |
| 7 | $40,000 | Building fires | 2025 | Significant |
| 8 | $40,000 | Building fires | 2025 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 51104.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Sioux City | 492 |
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 — 492 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.