City vs city
Centralia vs O'Fallon, IL
O'Fallon currently scores 6 points higher overall than Centralia, 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
Centralia: 34/100 · O'Fallon: 40/100
O'Fallon is 6 points higher.
Flood
Centralia: 43/100 · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Centralia: FEMA NFHL flood zones: 7 features intersect this tile.
O'Fallon: Flood model is not available for this location yet.
Wind
Centralia: 16/100 · O'Fallon: 16/100
No gap.
Centralia: Wind exposure derived from ingested design wind / climatology tiles.
O'Fallon: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Centralia: 47/100 · O'Fallon: 35/100
Centralia is 12 points higher.
Centralia: Lightning exposure derived from ingested climatology tiles.
O'Fallon: Lightning exposure derived from ingested climatology tiles.
Tornado
Centralia: 23/100 · O'Fallon: 73/100
O'Fallon is 50 points higher.
Centralia: Tornado risk derived from NOAA SPC historical reports.
O'Fallon: Tornado risk derived from NOAA SPC historical reports.
Hail
Centralia: 77/100 · O'Fallon: 100/100
O'Fallon is 23 points higher.
Centralia: Hail risk derived from NOAA SPC historical reports.
O'Fallon: Hail risk derived from NOAA SPC historical reports.
Storm surge
Centralia: Unavailable · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Centralia: Storm surge model is not available for this location yet.
O'Fallon: Storm surge model is not available for this location yet.
Wildfire
Centralia: 5/100 · O'Fallon: 30/100
O'Fallon is 25 points higher.
Centralia: Wildfire exposure derived from ingested fire potential tiles.
O'Fallon: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Centralia: 28/100 · O'Fallon: 29/100
O'Fallon is 1 points higher.
Centralia: 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.