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2025 County Report

Fires in Cerro Gordo County, IA

In 2025, fire departments serving Cerro Gordo County responded to 330 fire and hazmat incidents — including a single $600K property loss.

38,040 residents FIPS 19033 19 cities · 9 fire depts
Total incidents
330
1,676 across 5 years
Building fires
44
34 wildland
Property loss
$2.8M
$1.5M structure · $1.3M contents
Casualties
0 / 1
0 civ deaths · 1 civ inj · 0 FF inj
01 The mix

What kinds of fires happen here?

Unauthorized burning lead by count. Top five categories make up about 58% of all calls.

330
Total Incidents
Unauthorized burning 78 23.6%
Building fires 44 13.3%
Authorized controlled burning 29 8.8%
Gas leak (natural gas or LPG) 23 7.0%
Carbon monoxide incident 18 5.5%
All other categories 138 41.8%
02 Seasonality

When do fires happen in Cerro Gordo County?

Jan peaks. Dec dips.

Jan 42
Feb 15
Mar 25
Apr 39
May 36
Jun 21
Jul 37
Aug 25
Sep 29
Oct 25
Nov 27
Dec 9
03 Five-year trend

Year over year in Cerro Gordo County

1,676 incidents from 2021 through 2025.

YearIncidents 
2021 286
2022 314
2023 369
2024 377
2025 330
04 Cause of ignition

What sparks building fires?

For the 44 building fires departments responded to in 2025, here's how investigators classified them.

Unintentional
54%
50
Cause undetermined
16%
15
Intentional / arson
5%
5
Equipment / heat source failure
10%
9
Under investigation
7%
6
Act of nature (lightning)
8%
4
05 The biggest fires

10 fires · $1.3M in losses

Largest single-incident property losses in Cerro Gordo County during 2025. These 10 fires alone account for 84% of the county's total.

#Property lossCityTypeSeverity
1 $600,000 Mason City Building fires Major
2 $175,000 Mason City Building fires Significant
3 $150,000 Mason City Building fires Significant
4 $100,000 City of Ventura Building fires Significant
5 $58,000 Mason City Building fires Significant
6 $50,000 Mason City Passenger vehicle fire Significant
7 $48,140 Mason City Building fires Significant
8 $40,000 Mason City Passenger vehicle fire Significant
9 $30,000 Mason City Building fires Significant
10 $30,000 Mason City Building fires Significant
06 How Cerro Gordo County compares

Cerro Gordo County vs IA vs the nation

Per-capita rates let us compare apples to apples.

8.68
Incidents per 1,000 residents
Cerro Gordo County
8.68
IA avg
9.41
US avg
7.15
1.16
Building fires per 1,000 residents
Cerro Gordo County
1.16
IA avg
1.15
US avg
0.82
0
Civilian fire deaths per million
Cerro Gordo County
0
IA avg
7.3
US avg
5.8
07 Cities in this county

Largest cities in Cerro Gordo County

12 cities mapped to FIPS 19033.

08 First responders

Busiest fire departments in Cerro Gordo County

9 departments report from this county.

MASON CITY FIRE DEPT
Mason City
FDID 17003 267 incidents 47 paid
VENTURA FIRE DEPT
—
FDID 17010 39 incidents
CLEAR LAKE FIRE DEPT
—
FDID 17001 9 incidents
THORNTON FIRE DEPT
—
FDID 17009 9 incidents
DOUGHERTY FIRE DEPT
—
FDID 17002 1 incidents
09 Historical wildfires

Largest fires recorded in IA

Top 10 fire perimeters by acres burned (state-scoped fallback while we build out per-county polygons).

#NameYearAgencyAcres
1 IAWTR-FY19-RX-Dunbar Slough 2019 FWS 759
2 IANSR-FY19-RX-Highpoint Savanna 2019 FWS 737
3 IANSR-FY19-RX-N. Bison/Henslow hill 2019 FWS 482
4 Upper Iowa River Wildfire 2024 FWS 465
5 Cornland Wildfire 2018 FWS 402
6 Bottoms WF 2021 PRI 353
7 Crane Lake WF 2021 State 349
8 IAWTR-FY19-RX-Union Hills North 2019 FWS 315
9 Schott WF 2018 FWS 314
10 IAWTR-FY19-RX-Errington Marsh 2019 FWS 304

About this data

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.