City vs city
Isle of Palms vs Sullivan's Island, SC
Sullivan's Island currently scores 3 points higher overall than Isle of Palms, 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
Isle of Palms: 53/100 · Sullivan's Island: 56/100
Sullivan's Island is 3 points higher.
Flood
Isle of Palms: 100/100 · Sullivan's Island: 69/100
Isle of Palms is 31 points higher.
Isle of Palms: FEMA NFHL flood zones: 21 features intersect this tile.
Sullivan's Island: FEMA NFHL flood zones: 18 features intersect this tile.
Wind
Isle of Palms: 53/100 · Sullivan's Island: 53/100
No gap.
Isle of Palms: Wind exposure derived from ingested design wind / climatology tiles.
Sullivan's Island: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Isle of Palms: 43/100 · Sullivan's Island: 43/100
No gap.
Isle of Palms: Lightning exposure derived from ingested climatology tiles.
Sullivan's Island: Lightning exposure derived from ingested climatology tiles.
Tornado
Isle of Palms: 8/100 · Sullivan's Island: 77/100
Sullivan's Island is 69 points higher.
Isle of Palms: Tornado risk derived from NOAA SPC historical reports.
Sullivan's Island: Tornado risk derived from NOAA SPC historical reports.
Hail
Isle of Palms: 43/100 · Sullivan's Island: 74/100
Sullivan's Island is 31 points higher.
Isle of Palms: Hail risk derived from NOAA SPC historical reports.
Sullivan's Island: Hail risk derived from NOAA SPC historical reports.
Storm surge
Isle of Palms: 98/100 · Sullivan's Island: 98/100
No gap.
Isle of Palms: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Sullivan's Island: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Isle of Palms: 60/100 · Sullivan's Island: 11/100
Isle of Palms is 49 points higher.
Isle of Palms: Wildfire exposure derived from ingested fire potential tiles.
Sullivan's Island: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Isle of Palms: 20/100 · Sullivan's Island: 26/100
Sullivan's Island is 6 points higher.
Isle of Palms: 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.