City vs city
Isle of Palms vs Rock Hill, SC
Isle of Palms currently scores 11 points higher overall than Rock Hill, 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
Isle of Palms: 53/100 · Rock Hill: 42/100
Isle of Palms is 11 points higher.
Flood
Isle of Palms: 100/100 · Rock Hill: 33/100
Isle of Palms is 67 points higher.
Isle of Palms: FEMA NFHL flood zones: 21 features intersect this tile.
Rock Hill: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Isle of Palms: 53/100 · Rock Hill: 19/100
Isle of Palms is 34 points higher.
Isle of Palms: Wind exposure derived from ingested design wind / climatology tiles.
Rock Hill: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Isle of Palms: 43/100 · Rock Hill: 46/100
Rock Hill is 3 points higher.
Isle of Palms: Lightning exposure derived from ingested climatology tiles.
Rock Hill: Lightning exposure derived from ingested climatology tiles.
Tornado
Isle of Palms: 8/100 · Rock Hill: 19/100
Rock Hill is 11 points higher.
Isle of Palms: Tornado risk derived from NOAA SPC historical reports.
Rock Hill: Tornado risk derived from NOAA SPC historical reports.
Hail
Isle of Palms: 43/100 · Rock Hill: 100/100
Rock Hill is 57 points higher.
Isle of Palms: Hail risk derived from NOAA SPC historical reports.
Rock Hill: Hail risk derived from NOAA SPC historical reports.
Storm surge
Isle of Palms: 98/100 · Rock Hill: Unavailable
A score difference cannot be calculated without both sources.
Isle of Palms: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Rock Hill: Storm surge model is not available for this location yet.
Wildfire
Isle of Palms: 60/100 · Rock Hill: 52/100
Isle of Palms is 8 points higher.
Isle of Palms: Wildfire exposure derived from ingested fire potential tiles.
Rock Hill: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Isle of Palms: 20/100 · Rock Hill: 24/100
Rock Hill is 4 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.
Rock Hill: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.