City vs city
Alton vs Columbia, MO
Columbia currently scores 5 points higher overall than Alton, 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
Alton: 39/100 · Columbia: 44/100
Columbia is 5 points higher.
Flood
Alton: 43/100 · Columbia: 40/100
Alton is 3 points higher.
Alton: FEMA NFHL flood zones: 2 features intersect this tile.
Columbia: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
Alton: 15/100 · Columbia: 17/100
Columbia is 2 points higher.
Alton: Wind exposure derived from ingested design wind / climatology tiles.
Columbia: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Alton: 94/100 · Columbia: 46/100
Alton is 48 points higher.
Alton: Lightning exposure derived from ingested climatology tiles.
Columbia: Lightning exposure derived from ingested climatology tiles.
Tornado
Alton: 4/100 · Columbia: 69/100
Columbia is 65 points higher.
Alton: Tornado risk derived from NOAA SPC historical reports.
Columbia: Tornado risk derived from NOAA SPC historical reports.
Hail
Alton: 50/100 · Columbia: 100/100
Columbia is 50 points higher.
Alton: Hail risk derived from NOAA SPC historical reports.
Columbia: Hail risk derived from NOAA SPC historical reports.
Storm surge
Alton: Unavailable · Columbia: Unavailable
A score difference cannot be calculated without both sources.
Alton: Storm surge model is not available for this location yet.
Columbia: Storm surge model is not available for this location yet.
Wildfire
Alton: 39/100 · Columbia: 22/100
Alton is 17 points higher.
Alton: Wildfire exposure derived from ingested fire potential tiles.
Columbia: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Alton: 26/100 · Columbia: 12/100
Alton is 14 points higher.
Alton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Columbia: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.