City vs city
O'Fallon vs Shiloh, IL
O'Fallon and Shiloh are tied on overall score, with the biggest factor difference in wind.
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
O'Fallon: 40/100 · Shiloh: 40/100
No gap.
Flood
O'Fallon: Unavailable · Shiloh: Unavailable
A score difference cannot be calculated without both sources.
O'Fallon: Flood model is not available for this location yet.
Shiloh: Flood model is not available for this location yet.
Wind
O'Fallon: 16/100 · Shiloh: 16/100
No gap.
O'Fallon: Wind exposure derived from ingested design wind / climatology tiles.
Shiloh: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
O'Fallon: 35/100 · Shiloh: 35/100
No gap.
O'Fallon: Lightning exposure derived from ingested climatology tiles.
Shiloh: Lightning exposure derived from ingested climatology tiles.
Tornado
O'Fallon: 73/100 · Shiloh: 73/100
No gap.
O'Fallon: Tornado risk derived from NOAA SPC historical reports.
Shiloh: Tornado risk derived from NOAA SPC historical reports.
Hail
O'Fallon: 100/100 · Shiloh: 100/100
No gap.
O'Fallon: Hail risk derived from NOAA SPC historical reports.
Shiloh: Hail risk derived from NOAA SPC historical reports.
Storm surge
O'Fallon: Unavailable · Shiloh: Unavailable
A score difference cannot be calculated without both sources.
O'Fallon: Storm surge model is not available for this location yet.
Shiloh: Storm surge model is not available for this location yet.
Wildfire
O'Fallon: 30/100 · Shiloh: 30/100
No gap.
O'Fallon: Wildfire exposure derived from ingested fire potential tiles.
Shiloh: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
O'Fallon: 29/100 · Shiloh: 29/100
No gap.
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.
Shiloh: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.