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.

Collegedale

39/100

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Harrison

46/100

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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.