City vs city
Charleston vs Fort Mill, SC
Charleston currently scores 21 points higher overall than Fort Mill, with the largest gap in flood.
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
Charleston: 61/100 · Fort Mill: 40/100
Charleston is 21 points higher.
Flood
Charleston: 89/100 · Fort Mill: 27/100
Charleston is 62 points higher.
Charleston: FEMA NFHL flood zones: 33 features intersect this tile.
Fort Mill: FEMA NFHL flood zones: 7 features intersect this tile.
Wind
Charleston: 52/100 · Fort Mill: 19/100
Charleston is 33 points higher.
Charleston: Wind exposure derived from ingested design wind / climatology tiles.
Fort Mill: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Charleston: 45/100 · Fort Mill: 45/100
No gap.
Charleston: Lightning exposure derived from ingested climatology tiles.
Fort Mill: Lightning exposure derived from ingested climatology tiles.
Tornado
Charleston: 65/100 · Fort Mill: 12/100
Charleston is 53 points higher.
Charleston: Tornado risk derived from NOAA SPC historical reports.
Fort Mill: Tornado risk derived from NOAA SPC historical reports.
Hail
Charleston: 100/100 · Fort Mill: 93/100
Charleston is 7 points higher.
Charleston: Hail risk derived from NOAA SPC historical reports.
Fort Mill: Hail risk derived from NOAA SPC historical reports.
Storm surge
Charleston: 98/100 · Fort Mill: Unavailable
A score difference cannot be calculated without both sources.
Charleston: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Fort Mill: Storm surge model is not available for this location yet.
Wildfire
Charleston: 15/100 · Fort Mill: 50/100
Fort Mill is 35 points higher.
Charleston: Wildfire exposure derived from ingested fire potential tiles.
Fort Mill: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Charleston: 26/100 · Fort Mill: 35/100
Fort Mill is 9 points higher.
Charleston: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Fort Mill: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.