City vs city
Alton vs Granite City, IL
Granite City currently scores 3 points higher overall than Alton, 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
Alton: 34/100 · Granite City: 37/100
Granite City is 3 points higher.
Flood
Alton: 0/100 · Granite City: Unavailable
A score difference cannot be calculated without both sources.
Alton: FEMA NFHL flood zones: 0 features intersect this tile.
Granite City: Flood model is not available for this location yet.
Wind
Alton: 16/100 · Granite City: 16/100
No gap.
Alton: Wind exposure derived from ingested design wind / climatology tiles.
Granite City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Alton: 53/100 · Granite City: 42/100
Alton is 11 points higher.
Alton: Lightning exposure derived from ingested climatology tiles.
Granite City: Lightning exposure derived from ingested climatology tiles.
Tornado
Alton: 27/100 · Granite City: 62/100
Granite City is 35 points higher.
Alton: Tornado risk derived from NOAA SPC historical reports.
Granite City: Tornado risk derived from NOAA SPC historical reports.
Hail
Alton: 91/100 · Granite City: 79/100
Alton is 12 points higher.
Alton: Hail risk derived from NOAA SPC historical reports.
Granite City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Alton: Unavailable · Granite City: Unavailable
A score difference cannot be calculated without both sources.
Alton: Storm surge model is not available for this location yet.
Granite City: Storm surge model is not available for this location yet.
Wildfire
Alton: 16/100 · Granite City: 29/100
Granite City is 13 points higher.
Alton: Wildfire exposure derived from ingested fire potential tiles.
Granite City: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Alton: 35/100 · Granite City: 32/100
Alton is 3 points higher.
Alton: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Granite City: Air quality signal derived from the latest EPA AirNow combined AQI grid.