City vs city
Johnston City vs Rockford, IL
Johnston City currently scores 8 points higher overall than Rockford, with the largest gap in flood.
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
Johnston City: 48/100 · Rockford: 40/100
Johnston City is 8 points higher.
Flood
Johnston City: 76/100 · Rockford: 39/100
Johnston City is 37 points higher.
Johnston City: FEMA NFHL flood zones: 9 features intersect this tile.
Rockford: FEMA NFHL flood zones: 6 features intersect this tile.
Wind
Johnston City: 15/100 · Rockford: 16/100
Rockford is 1 points higher.
Johnston City: Wind exposure derived from ingested design wind / climatology tiles.
Rockford: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Johnston City: 48/100 · Rockford: 56/100
Rockford is 8 points higher.
Johnston City: Lightning exposure derived from ingested climatology tiles.
Rockford: Lightning exposure derived from ingested climatology tiles.
Tornado
Johnston City: 27/100 · Rockford: 15/100
Johnston City is 12 points higher.
Johnston City: Tornado risk derived from NOAA SPC historical reports.
Rockford: Tornado risk derived from NOAA SPC historical reports.
Hail
Johnston City: 100/100 · Rockford: 100/100
No gap.
Johnston City: Hail risk derived from NOAA SPC historical reports.
Rockford: Hail risk derived from NOAA SPC historical reports.
Storm surge
Johnston City: Unavailable · Rockford: Unavailable
A score difference cannot be calculated without both sources.
Johnston City: Storm surge model is not available for this location yet.
Rockford: Storm surge model is not available for this location yet.
Wildfire
Johnston City: 39/100 · Rockford: 26/100
Johnston City is 13 points higher.
Johnston City: Wildfire exposure derived from ingested fire potential tiles.
Rockford: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Johnston City: 30/100 · Rockford: 26/100
Johnston City is 4 points higher.
Johnston City: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Rockford: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.