City vs city
Joliet vs O'Fallon, IL
Joliet currently scores 7 points higher overall than O'Fallon, with the largest gap in wildfire.
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
Joliet: 47/100 · O'Fallon: 40/100
Joliet is 7 points higher.
Flood
Joliet: 44/100 · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Joliet: FEMA NFHL flood zones: 13 features intersect this tile.
O'Fallon: Flood model is not available for this location yet.
Wind
Joliet: 16/100 · O'Fallon: 16/100
No gap.
Joliet: Wind exposure derived from ingested design wind / climatology tiles.
O'Fallon: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Joliet: 43/100 · O'Fallon: 35/100
Joliet is 8 points higher.
Joliet: Lightning exposure derived from ingested climatology tiles.
O'Fallon: Lightning exposure derived from ingested climatology tiles.
Tornado
Joliet: 81/100 · O'Fallon: 73/100
Joliet is 8 points higher.
Joliet: Tornado risk derived from NOAA SPC historical reports.
O'Fallon: Tornado risk derived from NOAA SPC historical reports.
Hail
Joliet: 96/100 · O'Fallon: 100/100
O'Fallon is 4 points higher.
Joliet: Hail risk derived from NOAA SPC historical reports.
O'Fallon: Hail risk derived from NOAA SPC historical reports.
Storm surge
Joliet: Unavailable · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Joliet: Storm surge model is not available for this location yet.
O'Fallon: Storm surge model is not available for this location yet.
Wildfire
Joliet: 21/100 · O'Fallon: 30/100
O'Fallon is 9 points higher.
Joliet: Wildfire exposure derived from ingested fire potential tiles.
O'Fallon: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Joliet: 28/100 · O'Fallon: 29/100
O'Fallon is 1 points higher.
Joliet: 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.