City vs city
Aviston vs O'Fallon, IL
O'Fallon currently scores 1 points higher overall than Aviston, 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 is a current EPA AirNow signal; 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
Aviston: 39/100 · O'Fallon: 40/100
O'Fallon is 1 points higher.
Flood
Aviston: 25/100 · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Aviston: FEMA NFHL flood zones: 5 features intersect this tile.
O'Fallon: Flood model is not available for this location yet.
Wind
Aviston: 16/100 · O'Fallon: 16/100
No gap.
Aviston: Wind exposure derived from ingested design wind / climatology tiles.
O'Fallon: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Aviston: 40/100 · O'Fallon: 35/100
Aviston is 5 points higher.
Aviston: Lightning exposure derived from ingested climatology tiles.
O'Fallon: Lightning exposure derived from ingested climatology tiles.
Tornado
Aviston: 0/100 · O'Fallon: 73/100
O'Fallon is 73 points higher.
Aviston: Tornado risk derived from NOAA SPC historical reports.
O'Fallon: Tornado risk derived from NOAA SPC historical reports.
Hail
Aviston: 100/100 · O'Fallon: 100/100
No gap.
Aviston: Hail risk derived from NOAA SPC historical reports.
O'Fallon: Hail risk derived from NOAA SPC historical reports.
Storm surge
Aviston: Unavailable · O'Fallon: Unavailable
A score difference cannot be calculated without both sources.
Aviston: Storm surge model is not available for this location yet.
O'Fallon: Storm surge model is not available for this location yet.
Wildfire
Aviston: 23/100 · O'Fallon: 30/100
O'Fallon is 7 points higher.
Aviston: Wildfire exposure derived from ingested fire potential tiles.
O'Fallon: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Aviston: 30/100 · O'Fallon: 29/100
Aviston is 1 points higher.
Aviston: Air quality signal derived from the latest EPA AirNow combined AQI grid.
O'Fallon: Air quality signal derived from the latest EPA AirNow combined AQI grid.