City vs city
Charleston vs Watts Mills, SC
Charleston currently scores 25 points higher overall than Watts Mills, 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 · Watts Mills: 36/100
Charleston is 25 points higher.
Flood
Charleston: 89/100 · Watts Mills: 24/100
Charleston is 65 points higher.
Charleston: FEMA NFHL flood zones: 33 features intersect this tile.
Watts Mills: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Charleston: 52/100 · Watts Mills: 18/100
Charleston is 34 points higher.
Charleston: Wind exposure derived from ingested design wind / climatology tiles.
Watts Mills: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Charleston: 45/100 · Watts Mills: 49/100
Watts Mills is 4 points higher.
Charleston: Lightning exposure derived from ingested climatology tiles.
Watts Mills: Lightning exposure derived from ingested climatology tiles.
Tornado
Charleston: 65/100 · Watts Mills: 23/100
Charleston is 42 points higher.
Charleston: Tornado risk derived from NOAA SPC historical reports.
Watts Mills: Tornado risk derived from NOAA SPC historical reports.
Hail
Charleston: 100/100 · Watts Mills: 45/100
Charleston is 55 points higher.
Charleston: Hail risk derived from NOAA SPC historical reports.
Watts Mills: Hail risk derived from NOAA SPC historical reports.
Storm surge
Charleston: 98/100 · Watts Mills: Unavailable
A score difference cannot be calculated without both sources.
Charleston: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Watts Mills: Storm surge model is not available for this location yet.
Wildfire
Charleston: 15/100 · Watts Mills: 60/100
Watts Mills is 45 points higher.
Charleston: Wildfire exposure derived from ingested fire potential tiles.
Watts Mills: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Charleston: 26/100 · Watts Mills: 34/100
Watts Mills is 8 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.
Watts Mills: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.