City vs city
Chatham vs South Jacksonville, IL
South Jacksonville currently scores 8 points higher overall than Chatham, 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 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
Chatham: 41/100 · South Jacksonville: 49/100
South Jacksonville is 8 points higher.
Flood
Chatham: 39/100 · South Jacksonville: 48/100
South Jacksonville is 9 points higher.
Chatham: FEMA NFHL flood zones: 6 features intersect this tile.
South Jacksonville: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Chatham: 16/100 · South Jacksonville: 16/100
No gap.
Chatham: Wind exposure derived from ingested design wind / climatology tiles.
South Jacksonville: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Chatham: 63/100 · South Jacksonville: 55/100
Chatham is 8 points higher.
Chatham: Lightning exposure derived from ingested climatology tiles.
South Jacksonville: Lightning exposure derived from ingested climatology tiles.
Tornado
Chatham: 15/100 · South Jacksonville: 65/100
South Jacksonville is 50 points higher.
Chatham: Tornado risk derived from NOAA SPC historical reports.
South Jacksonville: Tornado risk derived from NOAA SPC historical reports.
Hail
Chatham: 100/100 · South Jacksonville: 100/100
No gap.
Chatham: Hail risk derived from NOAA SPC historical reports.
South Jacksonville: Hail risk derived from NOAA SPC historical reports.
Storm surge
Chatham: Unavailable · South Jacksonville: Unavailable
A score difference cannot be calculated without both sources.
Chatham: Storm surge model is not available for this location yet.
South Jacksonville: Storm surge model is not available for this location yet.
Wildfire
Chatham: 23/100 · South Jacksonville: 27/100
South Jacksonville is 4 points higher.
Chatham: Wildfire exposure derived from ingested fire potential tiles.
South Jacksonville: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Chatham: 28/100 · South Jacksonville: 29/100
South Jacksonville is 1 points higher.
Chatham: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
South Jacksonville: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.