City vs city
Dayton vs Spring Valley, OH
Dayton and Spring Valley are tied on overall score, with the biggest factor difference 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
Dayton: 45/100 · Spring Valley: 45/100
No gap.
Flood
Dayton: 74/100 · Spring Valley: 62/100
Dayton is 12 points higher.
Dayton: FEMA NFHL flood zones: 9 features intersect this tile.
Spring Valley: FEMA NFHL flood zones: 7 features intersect this tile.
Wind
Dayton: 15/100 · Spring Valley: 15/100
No gap.
Dayton: Wind exposure derived from ingested design wind / climatology tiles.
Spring Valley: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Dayton: 35/100 · Spring Valley: 30/100
Dayton is 5 points higher.
Dayton: Lightning exposure derived from ingested climatology tiles.
Spring Valley: Lightning exposure derived from ingested climatology tiles.
Tornado
Dayton: 46/100 · Spring Valley: 69/100
Spring Valley is 23 points higher.
Dayton: Tornado risk derived from NOAA SPC historical reports.
Spring Valley: Tornado risk derived from NOAA SPC historical reports.
Hail
Dayton: 100/100 · Spring Valley: 100/100
No gap.
Dayton: Hail risk derived from NOAA SPC historical reports.
Spring Valley: Hail risk derived from NOAA SPC historical reports.
Storm surge
Dayton: Unavailable · Spring Valley: Unavailable
A score difference cannot be calculated without both sources.
Dayton: Storm surge model is not available for this location yet.
Spring Valley: Storm surge model is not available for this location yet.
Wildfire
Dayton: 7/100 · Spring Valley: 7/100
No gap.
Dayton: Wildfire exposure derived from ingested fire potential tiles.
Spring Valley: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Dayton: 35/100 · Spring Valley: 35/100
No gap.
Dayton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Spring Valley: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.