ZIP 63057 is served primarily by Jefferson County, MO — including Arnold. ZIP-level data is sparse — showing the Jefferson 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 | Building fires | 389 | 15.5% | |
| 2 | Power line down | 346 | 13.8% | |
| 3 | Brush, or brush and grass mixture fire | 219 | 8.7% | |
| 4 | Gas leak (natural gas or LPG) | 177 | 7.1% | |
| 5 | Authorized controlled burning | 165 | 6.6% |
18 cities sit in Jefferson County. Click for the per-city NFIRS profile.
| # | City | Population | 2025 incidents | Building fires | Grade |
|---|---|---|---|---|---|
| 1 | Arnold | 20,840 | 241 | 11 | A- |
| 2 | Festus | 12,772 | 388 | 44 | C+ |
| 3 | Murphy | 8,427 | 0 | 0 | — |
| 4 | De Soto | 6,430 | 270 | 63 | D |
| 5 | Barnhart | 6,040 | 90 | 8 | B+ |
| 6 | Pevely | 6,012 | 67 | 20 | C+ |
| 7 | Imperial | 5,385 | 152 | 12 | B- |
| 8 | Herculaneum | 4,767 | 64 | 16 | B+ |
| 9 | Crystal City | 4,721 | 81 | 18 | B |
| 10 | High Ridge | 4,651 | 138 | 10 | C |
| 11 | Hillsboro | 3,467 | 201 | 47 | D |
| 12 | Byrnes Mill | 3,155 | 32 | 1 | A- |
| 13 | Raintree Plantation | 1,830 | 0 | 0 | — |
| 14 | Cedar Hill | 1,453 | 115 | 20 | F |
| 15 | LaBarque Creek | 1,201 | 0 | 0 | — |
| 16 | Summer Set | 1,168 | 0 | 0 | — |
| 17 | Horine | 945 | 0 | 0 | A+ |
| 18 | Olympian Village | 785 | 3 | 0 | A |
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 Jefferson 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.