In 2025, fire departments serving Naperville responded to 557 fire and hazmat incidents — from cooking fires to gas leaks to a single $450K building blaze. Here's the full picture.
Gas leak (natural gas or LPG) lead by count. Building fires lead by dollars. Together the top five categories make up about 65% of all calls.
Jul peaks. Dec dips. Watch for the typical fall climb starting in October.
3,042 incidents 2021–2025. Peak year was 2022. $10.9M cumulative property loss.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021 | 647 | — | |
| 2022 | 672 | +3.9% | |
| 2023 | 669 | -0.4% | |
| 2024 | 497 | -25.7% | |
| 2025 | 557 | +12.1% |
For the 41 building fires Naperville departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 588 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 | Outside area, other | 103 | 17.5% | |
| 2 | Engine area, running gear, wheel area | 75 | 12.8% | |
| 3 | Open area - outside; included are farmland, field | 68 | 11.6% | |
| 4 | Highway, parking lot, street: on or near | 55 | 9.4% | |
| 5 | Undetermined | 31 | 5.3% | |
| 6 | Cooking area, kitchen | 29 | 4.9% | |
| 7 | Courtyard, patio, porch, terrace | 23 | 3.9% | |
| 8 | Vehicle storage area; garage, carport | 19 | 3.2% | |
| 9 | Wildland, woods | 16 | 2.7% | |
| 10 | Laundry area, wash house (laundry) | 13 | 2.2% | |
| 11 | All other areas | 156 | 26.5% |
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 Naperville mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 208 | 35.4% | |
| 2 | Heat from powered equipment, other | 41 | 7.0% | |
| 3 | Cigarette | 41 | 7.0% | |
| 4 | Radiated, conducted heat from operating equipment | 40 | 6.8% | |
| 5 | Hot ember or ash | 33 | 5.6% | |
| 6 | Arcing | 30 | 5.1% | |
| 7 | Hot or smoldering object, other | 28 | 4.8% | |
| 8 | Chemical reaction | 22 | 3.7% | |
| 9 | Spark, ember or flame from operating equipment | 21 | 3.6% | |
| 10 | Heat source: other | 15 | 2.6% | |
| 11 | All other sources | 109 | 18.5% |
Largest single-incident property losses reported by Naperville departments in 2025. These 8 fires alone account for 89% of the city's annual total.
| # | Property loss | Type | Severity | Status |
|---|---|---|---|---|
| 1 | $450,000 | Building fires | Major | Investigated |
| 2 | $180,000 | Building fires | Significant | Investigated |
| 3 | $100,000 | Building fires | Significant | Investigated |
| 4 | $100,000 | Building fires | Significant | Investigated |
| 5 | $100,000 | Building fires | Significant | Investigated |
| 6 | $90,000 | Building fires | Significant | Investigated |
| 7 | $65,000 | Building fires | Significant | Investigated |
| 8 | $34,000 | Passenger vehicle fire | Significant | Investigated |
Per-capita rates let us compare apples to apples. Naperville sits below the national average for incidents per resident.
12 fire-related casualties recorded in NFIRS Module 11 across the 2021–2025 window. Age, gender, and severity are coarse-binned — no individual identification possible.
| Age | Count | |
|---|---|---|
| 0-9 | 0 | |
| 10-19 | 0 | |
| 20-29 | 2 | |
| 30-39 | 0 | |
| 40-49 | 2 | |
| 50-59 | 4 | |
| 60-69 | 0 | |
| 70-79 | 1 | |
| 80+ | 0 |
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 6,291 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.
| Year | Cause | Acres | Distance | |
|---|---|---|---|---|
| 2015 | Misuse of fire by a minor | 750 | 48.6 mi | |
| 2003 | Natural | 600 | 28.7 mi | |
| 2003 | Missing data/not specified/undetermined | 450 | 48.2 mi | |
| 2002 | Railroad operations and maintenance | 396 | 46.6 mi | |
| 1993 | Railroad operations and maintenance | 341 | 46.6 mi | |
| 2012 | Railroad operations and maintenance | 291 | 46.0 mi | |
| 2019 | Railroad operations and maintenance | 274 | 47.6 mi | |
| 1995 | Debris and open burning | 253 | 46.4 mi | |
| 1996 | Railroad operations and maintenance | 244 | 46.5 mi | |
| 2003 | Debris and open burning | 232 | 26.5 mi | |
| 2019 | Railroad operations and maintenance | 216 | 46.7 mi | |
| 2003 | Missing data/not specified/undetermined | 204 | 45.6 mi |
Top 10 ZIP codes by NFIRS incident count across 2021–2025. Each ZIP has its own fire profile — dive in for neighborhood-level context.
Six Illinois cities with population within ±25% of Naperville. Useful comparison targets — same state, similar size, different fire profile.
1 departments report to NFIRS for incidents in Naperville.
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.