City vs city
Collinsville vs O'Fallon, IL
O'Fallon currently scores 9 points higher overall than Collinsville, 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
Collinsville: 31/100 · O'Fallon: 40/100
O'Fallon is 9 points higher.
Flood
Collinsville: Unavailable · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Collinsville: Flood model is not available for this location yet.
O'Fallon: Flood model is not available for this location yet.
Wind
Collinsville: 16/100 · O'Fallon: 16/100
No gap.
Collinsville: Wind exposure derived from ingested design wind / climatology tiles.
O'Fallon: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Collinsville: 35/100 · O'Fallon: 35/100
No gap.
Collinsville: Lightning exposure derived from ingested climatology tiles.
O'Fallon: Lightning exposure derived from ingested climatology tiles.
Tornado
Collinsville: 19/100 · O'Fallon: 73/100
O'Fallon is 54 points higher.
Collinsville: Tornado risk derived from NOAA SPC historical reports.
O'Fallon: Tornado risk derived from NOAA SPC historical reports.
Hail
Collinsville: 100/100 · O'Fallon: 100/100
No gap.
Collinsville: Hail risk derived from NOAA SPC historical reports.
O'Fallon: Hail risk derived from NOAA SPC historical reports.
Storm surge
Collinsville: Unavailable · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Collinsville: Storm surge model is not available for this location yet.
O'Fallon: Storm surge model is not available for this location yet.
Wildfire
Collinsville: 18/100 · O'Fallon: 30/100
O'Fallon is 12 points higher.
Collinsville: Wildfire exposure derived from ingested fire potential tiles.
O'Fallon: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Collinsville: 31/100 · O'Fallon: 29/100
Collinsville is 2 points higher.
Collinsville: 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.