ZIP 50940 is served primarily by Polk County, IA — including Des Moines. ZIP-level data is sparse — showing the Polk 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 | Unauthorized burning | 553 | 16.7% | |
| 2 | Gas leak (natural gas or LPG) | 374 | 11.3% | |
| 3 | Building fires | 291 | 8.8% | |
| 4 | Passenger vehicle fire | 190 | 5.7% | |
| 5 | Outside rubbish, trash or waste fire | 165 | 5.0% |
16 cities sit in Polk County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Des Moines | 213,164 | 1,605 | 75 | A- |
| 2 | West Des Moines | 68,744 | 268 | 5 | A |
| 3 | Ankeny | 68,392 | 263 | 33 | A- |
| 4 | Urbandale | 45,591 | 242 | 26 | A |
| 5 | Johnston | 23,856 | 103 | 13 | A |
| 6 | Altoona | 20,017 | 89 | 20 | B+ |
| 7 | Clive | 18,576 | 139 | 16 | A- |
| 8 | Grimes | 15,402 | 85 | 20 | A |
| 9 | Pleasant Hill | 10,456 | 124 | 38 | B |
| 10 | Bondurant | 7,617 | 65 | 8 | A |
| 11 | Polk City | 5,604 | 28 | 3 | A |
| 12 | Windsor Heights | 5,200 | 5 | 1 | A+ |
| 13 | Carlisle | 4,116 | 67 | 3 | B- |
| 14 | Saylorville | 2,837 | 0 | 0 | — |
| 15 | Mitchellville | 2,506 | 44 | 3 | C+ |
| 16 | Elkhart | 553 | 34 | 4 | C |
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 Polk 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.