In 2025, fire departments serving Mason City responded to 47 fire and hazmat incidents — from cooking fires to gas leaks to a single $115K building blaze. Here's the full picture.
Fire, other lead by count. Building fires lead by dollars. Together the top five categories make up about 85% of all calls.
Nov peaks. Jun dips. Watch for the typical fall climb starting in October.
158 incidents 2021–2025. Peak year was 2025. $487K cumulative property loss.
| Year | Incidents | YoY | |
|---|---|---|---|
| 2021* | 17 | — | |
| 2022 | 20 | — | |
| 2023 | 33 | +65.0% | |
| 2024 | 41 | +24.2% | |
| 2025 | 47 | +14.6% |
* Well below Mason City'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 12 building fires Mason City departments responded to in 2025, here's how they were classified once investigators were finished.
NFIRS Area of Origin (AREA_ORIG) for the 60 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 | 15 | 25.0% | |
| 2 | Engine area, running gear, wheel area | 12 | 20.0% | |
| 3 | Open area - outside; included are farmland, field | 7 | 11.7% | |
| 4 | Other | 4 | 6.7% | |
| 5 | Cooking area, kitchen | 4 | 6.7% | |
| 6 | Undetermined | 4 | 6.7% | |
| 7 | Laundry area, wash house (laundry) | 2 | 3.3% | |
| 8 | Interior stairway or ramp | 1 | 1.7% | |
| 9 | Common room, den, family room, living room, lounge | 1 | 1.7% | |
| 10 | Function area, other | 1 | 1.7% | |
| 11 | All other areas | 9 | 15.0% |
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 Mason City mix.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Heat source: other | 19 | 31.7% | |
| 2 | Heat from powered equipment, other | 13 | 21.7% | |
| 3 | Undetermined | 7 | 11.7% | |
| 4 | Spark, ember or flame from operating equipment | 5 | 8.3% | |
| 5 | Hot or smoldering object, other | 5 | 8.3% | |
| 6 | Radiated, conducted heat from operating equipment | 3 | 5.0% | |
| 7 | Arcing | 2 | 3.3% | |
| 8 | Heat from other open flame or smoking materials | 2 | 3.3% | |
| 9 | Cigarette lighter | 2 | 3.3% | |
| 10 | Hot ember or ash | 1 | 1.7% | |
| 11 | All other sources | 1 | 1.7% |
Largest single-incident property losses reported by Mason City departments in 2025. These 1 fires alone account for 100% of the city's annual total.
| # | Property loss | Type | Severity | Status |
|---|---|---|---|---|
| 1 | $115,000 | Fire, other | Significant | Investigated |
Per-capita rates let us compare apples to apples. Mason City sits above the national average for incidents per resident.
Top 25 wildfires (1992+) in the FPA-FOD ignitions database, scaled by acres. 1,830 acres burned in this 50-mile radius. Each dot is a fire — bigger dots burned more land.
| Year | Cause | Acres | Distance | |
|---|---|---|---|---|
| 2012 | Missing data/not specified/undetermined | 375 | 15.6 mi | |
| 1999 | Debris and open burning | 250 | 23.9 mi | |
| 2012 | Missing data/not specified/undetermined | 200 | 33.5 mi | |
| 2018 | Debris and open burning | 200 | 42.3 mi | |
| 2018 | Equipment and vehicle use | 80 | 17.6 mi | |
| 2010 | Missing data/not specified/undetermined | 75 | 17.5 mi | |
| 2011 | Missing data/not specified/undetermined | 60 | 40.4 mi | |
| 2011 | Equipment and vehicle use | 55 | 37.0 mi | |
| 2010 | Debris and open burning | 50 | 22.7 mi | |
| 2014 | Missing data/not specified/undetermined | 50 | 33.0 mi | |
| 2012 | Equipment and vehicle use | 40 | 49.6 mi | |
| 2014 | Debris and open burning | 40 | 40.0 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 Illinois cities with population within ±25% of Mason City. Useful comparison targets — same state, similar size, different fire profile.
1 departments report to NFIRS for incidents in Mason City.
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.