ZIP 37363 recorded 226 fire and hazmat incidents in 2025, 1,078 across 2021–2025. Primary county: Hamilton County, TN. FEMA NRI rates wildfire risk here as High.
1,078 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 199 | |
| 2022 | 208 | |
| 2023 | 214 | |
| 2024 | 231 | |
| 2025 | 226 |
Mar peaks. Oct dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 37363 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Power line down | 240 | 22.3% | |
| 2 | Building fires | 105 | 9.7% | |
| 3 | Gas leak (natural gas or LPG) | 90 | 8.3% | |
| 4 | Brush, or brush and grass mixture fire | 69 | 6.4% | |
| 5 | Outside rubbish, trash or waste fire | 65 | 6.0% |
For the 11 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 37363 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 57 | 15.7% | |
| 2 | Engine area, running gear, wheel area | 48 | 13.2% | |
| 3 | Outside area, other | 42 | 11.5% | |
| 4 | Open area - outside; included are farmland, field | 41 | 11.3% | |
| 5 | Cooking area, kitchen | 26 | 7.1% | |
| 6 | Wildland, woods | 22 | 6.0% | |
| 7 | Highway, parking lot, street: on or near | 19 | 5.2% | |
| 8 | Other | 11 | 3.0% | |
| 9 | All other areas | 98 | 26.9% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 152 | 41.8% | |
| 2 | Hot ember or ash | 32 | 8.8% | |
| 3 | Radiated, conducted heat from operating equipment | 29 | 8.0% | |
| 4 | Spark, ember or flame from operating equipment | 19 | 5.2% | |
| 5 | Arcing | 17 | 4.7% | |
| 6 | Heat from powered equipment, other | 15 | 4.1% | |
| 7 | Hot or smoldering object, other | 13 | 3.6% | |
| 8 | Cigarette lighter | 11 | 3.0% | |
| 9 | All other sources | 76 | 20.9% |
Largest single-incident losses in ZIP 37363 across 2021–2025. These 8 fires alone account for 611% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $1,100,000 | Building fires | 2021 | Major |
| 2 | $400,000 | Building fires | 2023 | Major |
| 3 | $350,000 | Building fires | 2022 | Major |
| 4 | $350,000 | Building fires | 2024 | Major |
| 5 | $312,000 | Building fires | 2022 | Major |
| 6 | $280,000 | Building fires | 2024 | Major |
| 7 | $150,000 | Building fires | 2021 | Significant |
| 8 | $150,000 | Building fires | 2021 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 37363.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Chattanooga | 44 | |
| 2 | Collegedale | 14 | |
| 3 | Harrison | 2 | |
| 4 | McDonald | 2 | |
| 5 | Apison | 1 |
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 — 1,078 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.