ZIP 53121 recorded 181 fire and hazmat incidents in 2025, 679 across 2021–2025. Primary county: Walworth County, WI.
679 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 149 | |
| 2022 | 174 | |
| 2023 | 73 | |
| 2024 | 102 | |
| 2025 | 181 |
Jul peaks. Jan dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 53121 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Building fires | 208 | 30.6% | |
| 2 | Gas leak (natural gas or LPG) | 107 | 15.8% | |
| 3 | Arcing, shorted electrical equipment | 47 | 6.9% | |
| 4 | Power line down | 38 | 5.6% | |
| 5 | Passenger vehicle fire | 33 | 4.9% |
For the 62 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 53121 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Open area - outside; included are farmland, field | 34 | 20.4% | |
| 2 | Engine area, running gear, wheel area | 31 | 18.6% | |
| 3 | Undetermined | 13 | 7.8% | |
| 4 | Cooking area, kitchen | 11 | 6.6% | |
| 5 | Wall assembly | 9 | 5.4% | |
| 6 | Wall surface: exterior | 8 | 4.8% | |
| 7 | Highway, parking lot, street: on or near | 7 | 4.2% | |
| 8 | Heating room or area, water heater area | 5 | 3.0% | |
| 9 | All other areas | 49 | 29.3% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 66 | 39.5% | |
| 2 | Arcing | 19 | 11.4% | |
| 3 | Radiated, conducted heat from operating equipment | 16 | 9.6% | |
| 4 | Flying brand, ember, spark | 11 | 6.6% | |
| 5 | Hot ember or ash | 7 | 4.2% | |
| 6 | Chemical reaction | 7 | 4.2% | |
| 7 | Heat from powered equipment, other | 6 | 3.6% | |
| 8 | Spark, ember or flame from operating equipment | 5 | 3.0% | |
| 9 | All other sources | 30 | 18.0% |
Largest single-incident losses in ZIP 53121 across 2021–2025. These 8 fires alone account for 411% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $350,000 | Building fires | 2022 | Major |
| 2 | $300,000 | Building fires | 2024 | Major |
| 3 | $150,000 | Building fires | 2021 | Significant |
| 4 | $150,000 | Building fires | 2022 | Significant |
| 5 | $150,000 | Building fires | 2022 | Significant |
| 6 | $120,000 | Fires in structures other than in a building | 2023 | Significant |
| 7 | $100,000 | Building fires | 2021 | Significant |
| 8 | $100,000 | Building fires | 2021 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 53121.
The figures above are historical. For today's air quality, fire-weather warnings, and active fires, go to the official sources.
NFIRS reports each fire incident with a 5-digit address ZIP. We aggregate those rows directly to produce ZIP-level totals — 679 incidents in this ZIP across 2021–2025. Building-fire breakdowns (Area of Origin, Heat Source, ignition cause) only count fires investigators classified beyond the basic incident report. Because NFIRS reporting is voluntary, totals are a strong indicator rather than a complete census.