City vs city
Johnston vs Ridge Spring, SC
Ridge Spring currently scores 7 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
Johnston: 40/100 · Ridge Spring: 47/100
Ridge Spring is 7 points higher.
Flood
Johnston: 25/100 · Ridge Spring: 23/100
Johnston is 2 points higher.
Johnston: FEMA NFHL flood zones: 3 features intersect this tile.
Ridge Spring: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Johnston: 20/100 · Ridge Spring: 21/100
Ridge Spring is 1 points higher.
Johnston: Wind exposure derived from ingested design wind / climatology tiles.
Ridge Spring: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Johnston: 62/100 · Ridge Spring: 64/100
Ridge Spring is 2 points higher.
Johnston: Lightning exposure derived from ingested climatology tiles.
Ridge Spring: Lightning exposure derived from ingested climatology tiles.
Tornado
Johnston: 46/100 · Ridge Spring: 54/100
Ridge Spring is 8 points higher.
Johnston: Tornado risk derived from NOAA SPC historical reports.
Ridge Spring: Tornado risk derived from NOAA SPC historical reports.
Hail
Johnston: 35/100 · Ridge Spring: 76/100
Ridge Spring is 41 points higher.
Johnston: Hail risk derived from NOAA SPC historical reports.
Ridge Spring: Hail risk derived from NOAA SPC historical reports.
Storm surge
Johnston: Unavailable · Ridge Spring: Unavailable
A score difference cannot be calculated without both sources.
Johnston: Storm surge model is not available for this location yet.
Ridge Spring: Storm surge model is not available for this location yet.
Wildfire
Johnston: 69/100 · Ridge Spring: 62/100
Johnston is 7 points higher.
Johnston: Wildfire exposure derived from ingested fire potential tiles.
Ridge Spring: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Johnston: 26/100 · Ridge Spring: 26/100
No gap.
Johnston: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Ridge Spring: Air quality signal derived from the latest EPA AirNow combined AQI grid.