City vs city
Folly Beach vs Sullivan's Island, SC
Sullivan's Island currently scores 2 points higher overall than Folly Beach, 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 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
Folly Beach: 54/100 · Sullivan's Island: 56/100
Sullivan's Island is 2 points higher.
Flood
Folly Beach: 69/100 · Sullivan's Island: 69/100
No gap.
Folly Beach: FEMA NFHL flood zones: 12 features intersect this tile.
Sullivan's Island: FEMA NFHL flood zones: 18 features intersect this tile.
Wind
Folly Beach: 53/100 · Sullivan's Island: 53/100
No gap.
Folly Beach: Wind exposure derived from ingested design wind / climatology tiles.
Sullivan's Island: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Folly Beach: 43/100 · Sullivan's Island: 43/100
No gap.
Folly Beach: Lightning exposure derived from ingested climatology tiles.
Sullivan's Island: Lightning exposure derived from ingested climatology tiles.
Tornado
Folly Beach: 0/100 · Sullivan's Island: 77/100
Sullivan's Island is 77 points higher.
Folly Beach: Tornado risk derived from NOAA SPC historical reports.
Sullivan's Island: Tornado risk derived from NOAA SPC historical reports.
Hail
Folly Beach: 43/100 · Sullivan's Island: 74/100
Sullivan's Island is 31 points higher.
Folly Beach: Hail risk derived from NOAA SPC historical reports.
Sullivan's Island: Hail risk derived from NOAA SPC historical reports.
Storm surge
Folly Beach: 98/100 · Sullivan's Island: 98/100
No gap.
Folly Beach: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Sullivan's Island: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Folly Beach: 46/100 · Sullivan's Island: 11/100
Folly Beach is 35 points higher.
Folly Beach: Wildfire exposure derived from ingested fire potential tiles.
Sullivan's Island: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Folly Beach: 26/100 · Sullivan's Island: 26/100
No gap.
Folly Beach: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Sullivan's Island: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.