City vs city
Collegedale vs Harrison, TN
Harrison currently scores 7 points higher overall than Collegedale, with the largest gap in tornado.
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 is a current EPA AirNow signal; 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
Collegedale: 39/100 · Harrison: 46/100
Harrison is 7 points higher.
Flood
Collegedale: 33/100 · Harrison: 54/100
Harrison is 21 points higher.
Collegedale: FEMA NFHL flood zones: 6 features intersect this tile.
Harrison: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Collegedale: 13/100 · Harrison: 13/100
No gap.
Collegedale: Wind exposure derived from ingested design wind / climatology tiles.
Harrison: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Collegedale: 52/100 · Harrison: 50/100
Collegedale is 2 points higher.
Collegedale: Lightning exposure derived from ingested climatology tiles.
Harrison: Lightning exposure derived from ingested climatology tiles.
Tornado
Collegedale: 27/100 · Harrison: 50/100
Harrison is 23 points higher.
Collegedale: Tornado risk derived from NOAA SPC historical reports.
Harrison: Tornado risk derived from NOAA SPC historical reports.
Hail
Collegedale: 46/100 · Harrison: 50/100
Harrison is 4 points higher.
Collegedale: Hail risk derived from NOAA SPC historical reports.
Harrison: Hail risk derived from NOAA SPC historical reports.
Storm surge
Collegedale: Unavailable · Harrison: Unavailable
A score difference cannot be calculated without both sources.
Collegedale: Storm surge model is not available for this location yet.
Harrison: Storm surge model is not available for this location yet.
Wildfire
Collegedale: 67/100 · Harrison: 67/100
No gap.
Collegedale: Wildfire exposure derived from ingested fire potential tiles.
Harrison: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Collegedale: 36/100 · Harrison: 36/100
No gap.
Collegedale: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Harrison: Air quality signal derived from the latest EPA AirNow combined AQI grid.