City vs city
Harrison vs Marion, IL
Marion currently scores 3 points higher overall than Harrison, 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
Harrison: 42/100 · Marion: 45/100
Marion is 3 points higher.
Flood
Harrison: 43/100 · Marion: 43/100
No gap.
Harrison: FEMA NFHL flood zones: 6 features intersect this tile.
Marion: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Harrison: 15/100 · Marion: 15/100
No gap.
Harrison: Wind exposure derived from ingested design wind / climatology tiles.
Marion: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Harrison: 50/100 · Marion: 49/100
Harrison is 1 points higher.
Harrison: Lightning exposure derived from ingested climatology tiles.
Marion: Lightning exposure derived from ingested climatology tiles.
Tornado
Harrison: 23/100 · Marion: 50/100
Marion is 27 points higher.
Harrison: Tornado risk derived from NOAA SPC historical reports.
Marion: Tornado risk derived from NOAA SPC historical reports.
Hail
Harrison: 91/100 · Marion: 100/100
Marion is 9 points higher.
Harrison: Hail risk derived from NOAA SPC historical reports.
Marion: Hail risk derived from NOAA SPC historical reports.
Storm surge
Harrison: Unavailable · Marion: Unavailable
A score difference cannot be calculated without both sources.
Harrison: Storm surge model is not available for this location yet.
Marion: Storm surge model is not available for this location yet.
Wildfire
Harrison: 43/100 · Marion: 27/100
Harrison is 16 points higher.
Harrison: Wildfire exposure derived from ingested fire potential tiles.
Marion: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Harrison: 26/100 · Marion: 30/100
Marion is 4 points higher.
Harrison: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Marion: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.