City vs city
Greenville vs Johnston, SC
Greenville currently scores 6 points higher overall than Johnston, 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 is a current EPA AirNow signal; 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 · Johnston: 40/100
Greenville is 6 points higher.
Flood
Greenville: 24/100 · Johnston: 25/100
Johnston is 1 points higher.
Greenville: FEMA NFHL flood zones: 3 features intersect this tile.
Johnston: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Greenville: 17/100 · Johnston: 20/100
Johnston is 3 points higher.
Greenville: Wind exposure derived from ingested design wind / climatology tiles.
Johnston: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Greenville: 46/100 · Johnston: 62/100
Johnston is 16 points higher.
Greenville: Lightning exposure derived from ingested climatology tiles.
Johnston: Lightning exposure derived from ingested climatology tiles.
Tornado
Greenville: 38/100 · Johnston: 46/100
Johnston is 8 points higher.
Greenville: Tornado risk derived from NOAA SPC historical reports.
Johnston: Tornado risk derived from NOAA SPC historical reports.
Hail
Greenville: 100/100 · Johnston: 35/100
Greenville is 65 points higher.
Greenville: Hail risk derived from NOAA SPC historical reports.
Johnston: Hail risk derived from NOAA SPC historical reports.
Storm surge
Greenville: Unavailable · Johnston: Unavailable
A score difference cannot be calculated without both sources.
Greenville: Storm surge model is not available for this location yet.
Johnston: Storm surge model is not available for this location yet.
Wildfire
Greenville: 66/100 · Johnston: 69/100
Johnston is 3 points higher.
Greenville: Wildfire exposure derived from ingested fire potential tiles.
Johnston: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Greenville: 28/100 · Johnston: 26/100
Greenville is 2 points higher.
Greenville: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Johnston: Air quality signal derived from the latest EPA AirNow combined AQI grid.