City vs city
Gahanna vs Johnstown, OH
Gahanna currently scores 7 points higher overall than Johnstown, 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
Gahanna: 35/100 · Johnstown: 28/100
Gahanna is 7 points higher.
Flood
Gahanna: 88/100 · Johnstown: 48/100
Gahanna is 40 points higher.
Gahanna: FEMA NFHL flood zones: 15 features intersect this tile.
Johnstown: FEMA NFHL flood zones: 7 features intersect this tile.
Wind
Gahanna: 16/100 · Johnstown: 16/100
No gap.
Gahanna: Wind exposure derived from ingested design wind / climatology tiles.
Johnstown: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Gahanna: 26/100 · Johnstown: 30/100
Johnstown is 4 points higher.
Gahanna: Lightning exposure derived from ingested climatology tiles.
Johnstown: Lightning exposure derived from ingested climatology tiles.
Tornado
Gahanna: 4/100 · Johnstown: 12/100
Johnstown is 8 points higher.
Gahanna: Tornado risk derived from NOAA SPC historical reports.
Johnstown: Tornado risk derived from NOAA SPC historical reports.
Hail
Gahanna: 55/100 · Johnstown: 38/100
Gahanna is 17 points higher.
Gahanna: Hail risk derived from NOAA SPC historical reports.
Johnstown: Hail risk derived from NOAA SPC historical reports.
Storm surge
Gahanna: Unavailable · Johnstown: Unavailable
A score difference cannot be calculated without both sources.
Gahanna: Storm surge model is not available for this location yet.
Johnstown: Storm surge model is not available for this location yet.
Wildfire
Gahanna: 21/100 · Johnstown: 20/100
Gahanna is 1 points higher.
Gahanna: Wildfire exposure derived from ingested fire potential tiles.
Johnstown: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Gahanna: 34/100 · Johnstown: 35/100
Johnstown is 1 points higher.
Gahanna: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Johnstown: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.