City vs city
Chattanooga vs Harriman, TN
Chattanooga currently scores 7 points higher overall than Harriman, with the largest gap in hail.
Use this comparison for relocation decisions, insurance shopping, and hazard-prioritized mitigation planning.
Hazard breakdown
Scores describe each city’s reference grid tile, not every property. A missing model is unavailable, not zero risk. Air quality uses an ingested EPA AirNow snapshot and may not reflect current conditions; other factors describe baseline exposure. The overall score blends different hazards and is not a probability of damage. Read the scoring methodology and sources.
Overall
Chattanooga: 41/100 · Harriman: 34/100
Chattanooga is 7 points higher.
Flood
Chattanooga: 37/100 · Harriman: 38/100
Harriman is 1 points higher.
Chattanooga: FEMA NFHL flood zones: 7 features intersect this tile.
Harriman: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Chattanooga: 14/100 · Harriman: 13/100
Chattanooga is 1 points higher.
Chattanooga: Wind exposure derived from ingested design wind / climatology tiles.
Harriman: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Chattanooga: 52/100 · Harriman: 45/100
Chattanooga is 7 points higher.
Chattanooga: Lightning exposure derived from ingested climatology tiles.
Harriman: Lightning exposure derived from ingested climatology tiles.
Tornado
Chattanooga: 4/100 · Harriman: 0/100
Chattanooga is 4 points higher.
Chattanooga: Tornado risk derived from NOAA SPC historical reports.
Harriman: Tornado risk derived from NOAA SPC historical reports.
Hail
Chattanooga: 75/100 · Harriman: 32/100
Chattanooga is 43 points higher.
Chattanooga: Hail risk derived from NOAA SPC historical reports.
Harriman: Hail risk derived from NOAA SPC historical reports.
Storm surge
Chattanooga: Unavailable · Harriman: Unavailable
A score difference cannot be calculated without both sources.
Chattanooga: Storm surge model is not available for this location yet.
Harriman: Storm surge model is not available for this location yet.
Wildfire
Chattanooga: 69/100 · Harriman: 42/100
Chattanooga is 27 points higher.
Chattanooga: Wildfire exposure derived from ingested fire potential tiles.
Harriman: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Chattanooga: 36/100 · Harriman: 33/100
Chattanooga is 3 points higher.
Chattanooga: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Harriman: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.