In 2025, fire departments serving St. Louis County responded to 8,704 fire and hazmat incidents — including a single $4.1M property loss. FEMA NRI rates wildfire risk here as High.
Gas leak (natural gas or LPG) lead by count. Top five categories make up about 60% of all calls.
Mar peaks. Dec dips.
33,244 incidents from 2021 through 2025.
| Year | Incidents | |
|---|---|---|
| 2021 | 5,494 | |
| 2022 | 4,787 | |
| 2023 | 6,656 | |
| 2024 | 7,603 | |
| 2025 | 8,704 |
For the 1,242 building fires departments responded to in 2025, here's how investigators classified them.
Largest single-incident property losses in St. Louis County during 2025. These 10 fires alone account for 46% of the county's total.
| # | Property loss | City | Type | Severity |
|---|---|---|---|---|
| 1 | $4,120,700 | LADUE | Building fires | Major |
| 2 | $4,044,600 | CHESTERFIELD | Building fires | Major |
| 3 | $2,000,000 | Florissant | Fire, other | Major |
| 4 | $1,388,800 | UNINCORP ST LOUIS CO | Building fires | Major |
| 5 | $1,030,000 | St Louis | Building fires | Major |
| 6 | $1,000,000 | BELLEFONTAINE NE | Fire, other | Major |
| 7 | $900,000 | St Louis | Building fires | Major |
| 8 | $543,000 | WILDWOOD | Building fires | Major |
| 9 | $507,000 | CHESTERFIELD | Building fires | Major |
| 10 | $500,000 | Olivette | Building fires | Major |
Per-capita rates let us compare apples to apples.
12 cities mapped to FIPS 29189.
| City | Population | |
|---|---|---|
| Florissant | 52,167 | View › |
| Chesterfield | 49,645 | View › |
| Oakville | 35,412 | View › |
| Wildwood | 35,276 | View › |
| University City | 34,850 | View › |
| Ballwin | 30,948 | View › |
| Kirkwood | 29,309 | View › |
| Mehlville | 29,089 | View › |
| Maryland Heights | 28,099 | View › |
| Hazelwood | 25,345 | View › |
| Webster Groves | 23,838 | View › |
| Old Jamestown | 20,387 | View › |
21 departments report from this county.
Top 10 fire perimeters by acres burned (state-scoped fallback while we build out per-county polygons).
| # | Name | Year | Agency | Acres |
|---|---|---|---|---|
| 1 | Minninghaw | 2011 | USFS | 4,762 |
| 2 | Mud Pond | 2011 | USFS | 3,520 |
| 3 | Willie | 2020 | USFS | 2,472 |
| 4 | 23 Thorny Creek BIL RX | 2023 | NPS | 2,223 |
| 5 | Carty | 2015 | USFS | 2,145 |
| 6 | Swan Creek | 2019 | USFS | 2,119 |
| 7 | Rozell | 2018 | USFS | 2,102 |
| 8 | Devreaux | 2023 | USFS | 2,028 |
| 9 | Liberty | 2012 | USFS | 1,623 |
| 10 | Sugar | 2024 | USFS | 1,611 |
County-level NFIRS aggregates for 2025, plus 5-year totals across 2021–2025. NFIRS is voluntary — about 23,000 of roughly 30,000 US fire departments report — so totals are a strong indicator, not a complete census. Wildfire risk score (0–100) and Expected Annual Loss come from FEMA's National Risk Index. Drought class is the most recent USDM classification (D0 = abnormally dry through D4 = exceptional drought). Historical fire perimeters are sourced from the NIFC InterAgency Fire Perimeter History.