City vs city
Carbondale vs St. Johns, IL
St. Johns currently scores 1 points higher overall than Carbondale, 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
Carbondale: 46/100 · St. Johns: 47/100
St. Johns is 1 points higher.
Flood
Carbondale: 63/100 · St. Johns: 38/100
Carbondale is 25 points higher.
Carbondale: FEMA NFHL flood zones: 11 features intersect this tile.
St. Johns: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Carbondale: 15/100 · St. Johns: 15/100
No gap.
Carbondale: Wind exposure derived from ingested design wind / climatology tiles.
St. Johns: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Carbondale: 50/100 · St. Johns: 47/100
Carbondale is 3 points higher.
Carbondale: Lightning exposure derived from ingested climatology tiles.
St. Johns: Lightning exposure derived from ingested climatology tiles.
Tornado
Carbondale: 31/100 · St. Johns: 100/100
St. Johns is 69 points higher.
Carbondale: Tornado risk derived from NOAA SPC historical reports.
St. Johns: Tornado risk derived from NOAA SPC historical reports.
Hail
Carbondale: 100/100 · St. Johns: 79/100
Carbondale is 21 points higher.
Carbondale: Hail risk derived from NOAA SPC historical reports.
St. Johns: Hail risk derived from NOAA SPC historical reports.
Storm surge
Carbondale: Unavailable · St. Johns: Unavailable
A score difference cannot be calculated without both sources.
Carbondale: Storm surge model is not available for this location yet.
St. Johns: Storm surge model is not available for this location yet.
Wildfire
Carbondale: 34/100 · St. Johns: 24/100
Carbondale is 10 points higher.
Carbondale: Wildfire exposure derived from ingested fire potential tiles.
St. Johns: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Carbondale: 27/100 · St. Johns: 27/100
No gap.
Carbondale: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
St. Johns: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.