In 2025, fire departments serving Darien responded to 54 fire and hazmat incidents . Here's the full picture.
Building fires lead by count. Building fires lead by dollars. Together the top five categories make up about 85% of all calls.
Mar peaks. Jun dips. Watch for the typical fall climb starting in October.
156 incidents 2021–2025. Peak year was 2025. $300K cumulative property loss.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021* | 8 | — | |
| 2022 | 26 | — | |
| 2023 | 26 | +0.0% | |
| 2024 | 42 | +61.5% | |
| 2025 | 54 | +28.6% |
* Well below Darien's usual volume. That almost always means one or more departments didn't submit a full year to NFIRS, not that fires dropped, so no year-over-year change is shown for it.
For the 34 building fires Darien departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 23 building fires investigators classified across 2021–2025. The room or location where ignition occurred — kitchens, bedrooms, exterior, vehicle areas — tells you where to focus prevention.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 5 | 21.7% | |
| 2 | Engine area, running gear, wheel area | 4 | 17.4% | |
| 3 | Outside area, other | 3 | 13.0% | |
| 4 | Open area - outside; included are farmland, field | 2 | 8.7% | |
| 5 | Cooking area, kitchen | 1 | 4.3% | |
| 6 | Shipping/receiving area; loading area, dock or bay | 1 | 4.3% | |
| 7 | Vehicle storage area; garage, carport | 1 | 4.3% | |
| 8 | Substructure area or space, crawl space | 1 | 4.3% | |
| 9 | Ceiling & floor assembly, crawl space b/t stories | 1 | 4.3% | |
| 10 | Wall surface: exterior | 1 | 4.3% | |
| 11 | All other areas | 3 | 13.0% |
NFIRS Heat Source (HEAT_SOURC) — the physical thing that started it. Spark or ember from operating equipment, an open flame, smoking materials, or hot embers from a fireplace are the leading culprits nationwide. Here's the Darien mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 17 | 73.9% | |
| 2 | Radiated, conducted heat from operating equipment | 2 | 8.7% | |
| 3 | Arcing | 1 | 4.3% | |
| 4 | Heat from other open flame or smoking materials | 1 | 4.3% | |
| 5 | Heat spread from another fire, other | 1 | 4.3% | |
| 6 | Flying brand, ember, spark | 1 | 4.3% |
Per-capita rates let us compare apples to apples. Darien sits above the national average for incidents per resident.
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 7,883 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.
| Year | Cause | Acres | Distance | |
|---|---|---|---|---|
| 2000 | Equipment and vehicle use | 1,100 | 31.9 mi | |
| 2003 | Arson/incendiarism | 1,100 | 45.2 mi | |
| 2015 | Misuse of fire by a minor | 750 | 48.3 mi | |
| 2009 | Missing data/not specified/undetermined | 617 | 48.1 mi | |
| 1999 | Missing data/not specified/undetermined | 580 | 31.2 mi | |
| 2016 | Missing data/not specified/undetermined | 500 | 31.7 mi | |
| 2003 | Missing data/not specified/undetermined | 500 | 49.1 mi | |
| 2003 | Missing data/not specified/undetermined | 450 | 47.1 mi | |
| 2003 | Arson/incendiarism | 290 | 42.1 mi | |
| 2012 | Arson/incendiarism | 254 | 30.8 mi | |
| 2018 | Debris and open burning | 252 | 28.5 mi | |
| 2010 | Natural | 200 | 35.3 mi |
Top 2 ZIP codes by NFIRS incident count across 2021–2025. Each ZIP has its own fire profile — dive in for neighborhood-level context.
Six Wisconsin cities with population within ±25% of Darien. Useful comparison targets — same state, similar size, different fire profile.
1 departments report to NFIRS for incidents in Darien.
A 30-minute weekend can cut your home's exposure substantially. These four checklists are a good starting point.
Numbers reflect incidents reported by participating fire departments to the National Fire Incident Reporting System (NFIRS) Public Data Release for calendar year 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. Per-capita comparisons use 2023 ACS population estimates. Wildland fire data complements NFIRS with NIFC and USFS perimeters. Active-fire counts come from a dated NIFC snapshot, not a live feed.