City vs city
Coal Valley vs Rock Island, IL
Rock Island currently scores 2 points higher overall than Coal Valley, 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
Coal Valley: 38/100 · Rock Island: 40/100
Rock Island is 2 points higher.
Flood
Coal Valley: 54/100 · Rock Island: 48/100
Coal Valley is 6 points higher.
Coal Valley: FEMA NFHL flood zones: 7 features intersect this tile.
Rock Island: FEMA NFHL flood zones: 10 features intersect this tile.
Wind
Coal Valley: 17/100 · Rock Island: 17/100
No gap.
Coal Valley: Wind exposure derived from ingested design wind / climatology tiles.
Rock Island: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Coal Valley: 42/100 · Rock Island: 42/100
No gap.
Coal Valley: Lightning exposure derived from ingested climatology tiles.
Rock Island: Lightning exposure derived from ingested climatology tiles.
Tornado
Coal Valley: 12/100 · Rock Island: 15/100
Rock Island is 3 points higher.
Coal Valley: Tornado risk derived from NOAA SPC historical reports.
Rock Island: Tornado risk derived from NOAA SPC historical reports.
Hail
Coal Valley: 86/100 · Rock Island: 100/100
Rock Island is 14 points higher.
Coal Valley: Hail risk derived from NOAA SPC historical reports.
Rock Island: Hail risk derived from NOAA SPC historical reports.
Storm surge
Coal Valley: Unavailable · Rock Island: Unavailable
A score difference cannot be calculated without both sources.
Coal Valley: Storm surge model is not available for this location yet.
Rock Island: Storm surge model is not available for this location yet.
Wildfire
Coal Valley: 32/100 · Rock Island: 33/100
Rock Island is 1 points higher.
Coal Valley: Wildfire exposure derived from ingested fire potential tiles.
Rock Island: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Coal Valley: 26/100 · Rock Island: 26/100
No gap.
Coal Valley: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Rock Island: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.