City vs city
Edgefield vs Johnston, SC
Edgefield currently scores 2 points higher overall than Johnston, 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
Edgefield: 42/100 · Johnston: 40/100
Edgefield is 2 points higher.
Flood
Edgefield: 27/100 · Johnston: 25/100
Edgefield is 2 points higher.
Edgefield: FEMA NFHL flood zones: 3 features intersect this tile.
Johnston: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Edgefield: 20/100 · Johnston: 20/100
No gap.
Edgefield: Wind exposure derived from ingested design wind / climatology tiles.
Johnston: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Edgefield: 61/100 · Johnston: 62/100
Johnston is 1 points higher.
Edgefield: Lightning exposure derived from ingested climatology tiles.
Johnston: Lightning exposure derived from ingested climatology tiles.
Tornado
Edgefield: 0/100 · Johnston: 46/100
Johnston is 46 points higher.
Edgefield: Tornado risk derived from NOAA SPC historical reports.
Johnston: Tornado risk derived from NOAA SPC historical reports.
Hail
Edgefield: 47/100 · Johnston: 35/100
Edgefield is 12 points higher.
Edgefield: Hail risk derived from NOAA SPC historical reports.
Johnston: Hail risk derived from NOAA SPC historical reports.
Storm surge
Edgefield: Unavailable · Johnston: Unavailable
A score difference cannot be calculated without both sources.
Edgefield: Storm surge model is not available for this location yet.
Johnston: Storm surge model is not available for this location yet.
Wildfire
Edgefield: 69/100 · Johnston: 69/100
No gap.
Edgefield: Wildfire exposure derived from ingested fire potential tiles.
Johnston: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Edgefield: 26/100 · Johnston: 26/100
No gap.
Edgefield: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Johnston: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.