City vs city
Greenville vs Harbor Island, SC
Harbor Island currently scores 1 points higher overall than Greenville, with the largest gap in hail.
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
Greenville: 46/100 · Harbor Island: 47/100
Harbor Island is 1 points higher.
Flood
Greenville: 24/100 · Harbor Island: 85/100
Harbor Island is 61 points higher.
Greenville: FEMA NFHL flood zones: 3 features intersect this tile.
Harbor Island: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Greenville: 17/100 · Harbor Island: 49/100
Harbor Island is 32 points higher.
Greenville: Wind exposure derived from ingested design wind / climatology tiles.
Harbor Island: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Greenville: 46/100 · Harbor Island: 52/100
Harbor Island is 6 points higher.
Greenville: Lightning exposure derived from ingested climatology tiles.
Harbor Island: Lightning exposure derived from ingested climatology tiles.
Tornado
Greenville: 38/100 · Harbor Island: 0/100
Greenville is 38 points higher.
Greenville: Tornado risk derived from NOAA SPC historical reports.
Harbor Island: Tornado risk derived from NOAA SPC historical reports.
Hail
Greenville: 100/100 · Harbor Island: 4/100
Greenville is 96 points higher.
Greenville: Hail risk derived from NOAA SPC historical reports.
Harbor Island: Hail risk derived from NOAA SPC historical reports.
Storm surge
Greenville: Unavailable · Harbor Island: 98/100
A score difference cannot be calculated without both sources.
Greenville: Storm surge model is not available for this location yet.
Harbor Island: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Greenville: 66/100 · Harbor Island: 16/100
Greenville is 50 points higher.
Greenville: Wildfire exposure derived from ingested fire potential tiles.
Harbor Island: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Greenville: 28/100 · Harbor Island: 24/100
Greenville is 4 points higher.
Greenville: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Harbor 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.