ZIP 51018 is served primarily by Woodbury County, IA — including Sioux City. ZIP-level data is sparse — showing the Woodbury County aggregate. FEMA NRI rates wildfire risk here as Very High.
Mar peaks. Dec dips. ZIP-level seasonality is sparse — this is the county aggregate.
Top 5 NFIRS incident types — county-level breakdown.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Unauthorized burning | 163 | 20.3% | |
| 2 | Power line down | 82 | 10.2% | |
| 3 | Building fires | 77 | 9.6% | |
| 4 | Grass fire | 56 | 7.0% | |
| 5 | Gas leak (natural gas or LPG) | 50 | 6.2% |
7 cities sit in Woodbury County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Sioux City | 85,469 | 672 | 48 | A- |
| 2 | Sergeant Bluff | 5,007 | 11 | 2 | A+ |
| 3 | Moville | 1,640 | 30 | 4 | B- |
| 4 | Sloan | 1,051 | 2 | 1 | A+ |
| 5 | Lawton | 1,021 | 27 | 7 | C- |
| 6 | Correctionville | 810 | 0 | 0 | A+ |
| 7 | Anthon | 527 | 1 | 0 | C+ |
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
This ZIP doesn't have enough NFIRS coverage on its own (under 10 reported incidents across 2021–2025) to publish ZIP-level statistics, so we're showing the Woodbury County aggregate above. NFIRS reporting is voluntary and many rural ZIPs roll up to broader county totals. The ZIP-to-county mapping uses SimpleMaps' uscities.zips dataset.