City vs city
Chattanooga vs Portland, TN
Chattanooga currently scores 4 points higher overall than Portland, with the largest gap in wildfire.
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 · Portland: 37/100
Chattanooga is 4 points higher.
Flood
Chattanooga: 37/100 · Portland: 28/100
Chattanooga is 9 points higher.
Chattanooga: FEMA NFHL flood zones: 7 features intersect this tile.
Portland: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Chattanooga: 14/100 · Portland: 14/100
No gap.
Chattanooga: Wind exposure derived from ingested design wind / climatology tiles.
Portland: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Chattanooga: 52/100 · Portland: 52/100
No gap.
Chattanooga: Lightning exposure derived from ingested climatology tiles.
Portland: Lightning exposure derived from ingested climatology tiles.
Tornado
Chattanooga: 4/100 · Portland: 38/100
Portland is 34 points higher.
Chattanooga: Tornado risk derived from NOAA SPC historical reports.
Portland: Tornado risk derived from NOAA SPC historical reports.
Hail
Chattanooga: 75/100 · Portland: 64/100
Chattanooga is 11 points higher.
Chattanooga: Hail risk derived from NOAA SPC historical reports.
Portland: Hail risk derived from NOAA SPC historical reports.
Storm surge
Chattanooga: Unavailable · Portland: Unavailable
A score difference cannot be calculated without both sources.
Chattanooga: Storm surge model is not available for this location yet.
Portland: Storm surge model is not available for this location yet.
Wildfire
Chattanooga: 69/100 · Portland: 26/100
Chattanooga is 43 points higher.
Chattanooga: Wildfire exposure derived from ingested fire potential tiles.
Portland: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Chattanooga: 36/100 · Portland: 36/100
No gap.
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.
Portland: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.