City vs city
Alton vs Royal Lakes, IL
Alton currently scores 10 points higher overall than Royal Lakes, 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
Alton: 34/100 · Royal Lakes: 24/100
Alton is 10 points higher.
Flood
Alton: 0/100 · Royal Lakes: Unavailable
A score difference cannot be calculated without both sources.
Alton: FEMA NFHL flood zones: 0 features intersect this tile.
Royal Lakes: Flood model is not available for this location yet.
Wind
Alton: 16/100 · Royal Lakes: 16/100
No gap.
Alton: Wind exposure derived from ingested design wind / climatology tiles.
Royal Lakes: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Alton: 53/100 · Royal Lakes: 63/100
Royal Lakes is 10 points higher.
Alton: Lightning exposure derived from ingested climatology tiles.
Royal Lakes: Lightning exposure derived from ingested climatology tiles.
Tornado
Alton: 27/100 · Royal Lakes: 8/100
Alton is 19 points higher.
Alton: Tornado risk derived from NOAA SPC historical reports.
Royal Lakes: Tornado risk derived from NOAA SPC historical reports.
Hail
Alton: 91/100 · Royal Lakes: 18/100
Alton is 73 points higher.
Alton: Hail risk derived from NOAA SPC historical reports.
Royal Lakes: Hail risk derived from NOAA SPC historical reports.
Storm surge
Alton: Unavailable · Royal Lakes: Unavailable
A score difference cannot be calculated without both sources.
Alton: Storm surge model is not available for this location yet.
Royal Lakes: Storm surge model is not available for this location yet.
Wildfire
Alton: 16/100 · Royal Lakes: 29/100
Royal Lakes is 13 points higher.
Alton: Wildfire exposure derived from ingested fire potential tiles.
Royal Lakes: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Alton: 35/100 · Royal Lakes: 33/100
Alton is 2 points higher.
Alton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Royal Lakes: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.