ZIP 37403 recorded 61 fire and hazmat incidents in 2025, 411 across 2021–2025. Primary county: Hamilton County, TN. FEMA NRI rates wildfire risk here as High.
411 incidents from 2021 through 2025 inside this ZIP.
| Year | Incidents | |
|---|---|---|
| 2021 | 65 | |
| 2022 | 135 | |
| 2023 | 94 | |
| 2024 | 56 | |
| 2025 | 61 |
Apr peaks. Dec dips. Aggregated across all 5 years inside this ZIP.
Top 5 NFIRS incident types for ZIP 37403 across 2021–2025.
| # | Incident type | Count | Share | |
|---|---|---|---|---|
| 1 | Outside rubbish, trash or waste fire | 142 | 34.5% | |
| 2 | Power line down | 28 | 6.8% | |
| 3 | Gas leak (natural gas or LPG) | 26 | 6.3% | |
| 4 | Dumpster or other outside trash receptacle fire | 20 | 4.9% | |
| 5 | Building fires | 18 | 4.4% |
For the 4 building fires reported here in 2025, here's how investigators classified ignition cause.
NFIRS Area of Origin for ZIP 37403 fires across 2021–2025.
| # | Area of origin | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 65 | 27.8% | |
| 2 | Outside area, other | 57 | 24.4% | |
| 3 | Open area - outside; included are farmland, field | 22 | 9.4% | |
| 4 | Engine area, running gear, wheel area | 13 | 5.6% | |
| 5 | Highway, parking lot, street: on or near | 12 | 5.1% | |
| 6 | Railroad right of way: on or near | 8 | 3.4% | |
| 7 | Chute/container - trash, rubbish, waste | 7 | 3.0% | |
| 8 | Other | 5 | 2.1% | |
| 9 | All other areas | 45 | 19.2% |
NFIRS HEAT_SOURC code — the physical thing that started the fire.
| # | Heat source | Count | Share | |
|---|---|---|---|---|
| 1 | Undetermined | 159 | 67.9% | |
| 2 | Cigarette lighter | 16 | 6.8% | |
| 3 | Hot or smoldering object, other | 13 | 5.6% | |
| 4 | Hot ember or ash | 8 | 3.4% | |
| 5 | Arcing | 7 | 3.0% | |
| 6 | Heat from other open flame or smoking materials | 5 | 2.1% | |
| 7 | Heat from powered equipment, other | 4 | 1.7% | |
| 8 | Cigarette | 4 | 1.7% | |
| 9 | All other sources | 18 | 7.7% |
Largest single-incident losses in ZIP 37403 across 2021–2025. These 8 fires alone account for 284% of the ZIP's 2025 reported total.
| # | Property loss | Type | Year | Severity |
|---|---|---|---|---|
| 1 | $50,000 | Building fires | 2025 | Significant |
| 2 | $30,000 | Building fires | 2022 | Significant |
| 3 | $30,000 | Off-road vehicle or heavy equipment fire | 2023 | Significant |
| 4 | $25,000 | Building fires | 2023 | Significant |
| 5 | $20,000 | Building fires | 2023 | Significant |
| 6 | $20,000 | Building fires | 2024 | Significant |
| 7 | $13,000 | Passenger vehicle fire | 2022 | Significant |
| 8 | $10,000 | Building fires | 2022 | Significant |
Some ZIPs span multiple cities. Ranked by 5-yr NFIRS incidents inside ZIP 37403.
| # | City | 5-yr incidents | |
|---|---|---|---|
| 1 | Chattanooga | 408 | |
| 2 | Walden | 2 |
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 — 411 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.