City vs city
Herrin vs St. Johns, IL
St. Johns currently scores 6 points higher overall than Herrin, 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
Herrin: 41/100 · St. Johns: 47/100
St. Johns is 6 points higher.
Flood
Herrin: 47/100 · St. Johns: 38/100
Herrin is 9 points higher.
Herrin: FEMA NFHL flood zones: 3 features intersect this tile.
St. Johns: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Herrin: 15/100 · St. Johns: 15/100
No gap.
Herrin: Wind exposure derived from ingested design wind / climatology tiles.
St. Johns: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Herrin: 49/100 · St. Johns: 47/100
Herrin is 2 points higher.
Herrin: Lightning exposure derived from ingested climatology tiles.
St. Johns: Lightning exposure derived from ingested climatology tiles.
Tornado
Herrin: 15/100 · St. Johns: 100/100
St. Johns is 85 points higher.
Herrin: Tornado risk derived from NOAA SPC historical reports.
St. Johns: Tornado risk derived from NOAA SPC historical reports.
Hail
Herrin: 100/100 · St. Johns: 79/100
Herrin is 21 points higher.
Herrin: Hail risk derived from NOAA SPC historical reports.
St. Johns: Hail risk derived from NOAA SPC historical reports.
Storm surge
Herrin: Unavailable · St. Johns: Unavailable
A score difference cannot be calculated without both sources.
Herrin: Storm surge model is not available for this location yet.
St. Johns: Storm surge model is not available for this location yet.
Wildfire
Herrin: 35/100 · St. Johns: 24/100
Herrin is 11 points higher.
Herrin: Wildfire exposure derived from ingested fire potential tiles.
St. Johns: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Herrin: 29/100 · St. Johns: 27/100
Herrin is 2 points higher.
Herrin: 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.