City vs city
O'Fallon vs Round Lake Beach, IL
O'Fallon currently scores 1 points higher overall than Round Lake Beach, with the largest gap in hail.
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 · Round Lake Beach: 39/100
O'Fallon is 1 points higher.
Flood
O'Fallon: Unavailable · Round Lake Beach: 48/100
A score difference cannot be calculated without both sources.
O'Fallon: Flood model is not available for this location yet.
Round Lake Beach: FEMA NFHL flood zones: 14 features intersect this tile.
Wind
O'Fallon: 16/100 · Round Lake Beach: 15/100
O'Fallon is 1 points higher.
O'Fallon: Wind exposure derived from ingested design wind / climatology tiles.
Round Lake Beach: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
O'Fallon: 35/100 · Round Lake Beach: 57/100
Round Lake Beach is 22 points higher.
O'Fallon: Lightning exposure derived from ingested climatology tiles.
Round Lake Beach: Lightning exposure derived from ingested climatology tiles.
Tornado
O'Fallon: 73/100 · Round Lake Beach: 38/100
O'Fallon is 35 points higher.
O'Fallon: Tornado risk derived from NOAA SPC historical reports.
Round Lake Beach: Tornado risk derived from NOAA SPC historical reports.
Hail
O'Fallon: 100/100 · Round Lake Beach: 57/100
O'Fallon is 43 points higher.
O'Fallon: Hail risk derived from NOAA SPC historical reports.
Round Lake Beach: Hail risk derived from NOAA SPC historical reports.
Storm surge
O'Fallon: Unavailable · Round Lake Beach: Unavailable
A score difference cannot be calculated without both sources.
O'Fallon: Storm surge model is not available for this location yet.
Round Lake Beach: Storm surge model is not available for this location yet.
Wildfire
O'Fallon: 30/100 · Round Lake Beach: 36/100
Round Lake Beach is 6 points higher.
O'Fallon: Wildfire exposure derived from ingested fire potential tiles.
Round Lake Beach: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
O'Fallon: 29/100 · Round Lake Beach: 22/100
O'Fallon is 7 points higher.
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.
Round Lake Beach: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.