City vs city
Barnwell vs Charleston, SC
Charleston currently scores 20 points higher overall than Barnwell, 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
Barnwell: 41/100 · Charleston: 61/100
Charleston is 20 points higher.
Flood
Barnwell: 35/100 · Charleston: 89/100
Charleston is 54 points higher.
Barnwell: FEMA NFHL flood zones: 12 features intersect this tile.
Charleston: FEMA NFHL flood zones: 33 features intersect this tile.
Wind
Barnwell: 26/100 · Charleston: 52/100
Charleston is 26 points higher.
Barnwell: Wind exposure derived from ingested design wind / climatology tiles.
Charleston: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Barnwell: 69/100 · Charleston: 45/100
Barnwell is 24 points higher.
Barnwell: Lightning exposure derived from ingested climatology tiles.
Charleston: Lightning exposure derived from ingested climatology tiles.
Tornado
Barnwell: 12/100 · Charleston: 65/100
Charleston is 53 points higher.
Barnwell: Tornado risk derived from NOAA SPC historical reports.
Charleston: Tornado risk derived from NOAA SPC historical reports.
Hail
Barnwell: 53/100 · Charleston: 100/100
Charleston is 47 points higher.
Barnwell: Hail risk derived from NOAA SPC historical reports.
Charleston: Hail risk derived from NOAA SPC historical reports.
Storm surge
Barnwell: Unavailable · Charleston: 98/100
A score difference cannot be calculated without both sources.
Barnwell: Storm surge model is not available for this location yet.
Charleston: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Barnwell: 69/100 · Charleston: 15/100
Barnwell is 54 points higher.
Barnwell: Wildfire exposure derived from ingested fire potential tiles.
Charleston: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Barnwell: 26/100 · Charleston: 26/100
No gap.
Barnwell: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
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.