City vs city
Columbia vs O'Fallon, MO
O'Fallon currently scores 2 points higher overall than Columbia, 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
Columbia: 44/100 · O'Fallon: 46/100
O'Fallon is 2 points higher.
Flood
Columbia: 40/100 · O'Fallon: 44/100
O'Fallon is 4 points higher.
Columbia: FEMA NFHL flood zones: 12 features intersect this tile.
O'Fallon: FEMA NFHL flood zones: 6 features intersect this tile.
Wind
Columbia: 17/100 · O'Fallon: 16/100
Columbia is 1 points higher.
Columbia: Wind exposure derived from ingested design wind / climatology tiles.
O'Fallon: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Columbia: 46/100 · O'Fallon: 46/100
No gap.
Columbia: Lightning exposure derived from ingested climatology tiles.
O'Fallon: Lightning exposure derived from ingested climatology tiles.
Tornado
Columbia: 69/100 · O'Fallon: 50/100
Columbia is 19 points higher.
Columbia: Tornado risk derived from NOAA SPC historical reports.
O'Fallon: Tornado risk derived from NOAA SPC historical reports.
Hail
Columbia: 100/100 · O'Fallon: 100/100
No gap.
Columbia: Hail risk derived from NOAA SPC historical reports.
O'Fallon: Hail risk derived from NOAA SPC historical reports.
Storm surge
Columbia: Unavailable · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Columbia: Storm surge model is not available for this location yet.
O'Fallon: Storm surge model is not available for this location yet.
Wildfire
Columbia: 22/100 · O'Fallon: 41/100
O'Fallon is 19 points higher.
Columbia: Wildfire exposure derived from ingested fire potential tiles.
O'Fallon: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Columbia: 12/100 · O'Fallon: 28/100
O'Fallon is 16 points higher.
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.
O'Fallon: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.