ZIP 50033 is served primarily by Madison County, IA — including Winterset. ZIP-level data is sparse — showing the Madison County aggregate. FEMA NRI rates wildfire risk here as Moderate.
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 | Grass fire | 51 | 34.2% | |
| 2 | Gas leak (natural gas or LPG) | 15 | 10.1% | |
| 3 | Building fires | 11 | 7.4% | |
| 4 | Passenger vehicle fire | 11 | 7.4% | |
| 5 | Brush, or brush and grass mixture fire | 11 | 7.4% |
4 cities sit in Madison County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Winterset | 5,366 | 72 | 4 | B+ |
| 2 | Earlham | 1,367 | 45 | 2 | C+ |
| 3 | St. Charles | 903 | 0 | 0 | — |
| 4 | Truro | 581 | 7 | 1 | A- |
Some ZIPs span multiple counties. The primary above is the largest by population weight; secondary counties are below.
| County | State | Weight | |
|---|---|---|---|
| Warren County | IA | 0.50 | FIPS 19181 |
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 Madison 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.