City vs city
Downers Grove vs Joliet, IL
Joliet currently scores 7 points higher overall than Downers Grove, 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
Downers Grove: 40/100 · Joliet: 47/100
Joliet is 7 points higher.
Flood
Downers Grove: 47/100 · Joliet: 44/100
Downers Grove is 3 points higher.
Downers Grove: FEMA NFHL flood zones: 11 features intersect this tile.
Joliet: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Downers Grove: 16/100 · Joliet: 16/100
No gap.
Downers Grove: Wind exposure derived from ingested design wind / climatology tiles.
Joliet: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Downers Grove: 41/100 · Joliet: 43/100
Joliet is 2 points higher.
Downers Grove: Lightning exposure derived from ingested climatology tiles.
Joliet: Lightning exposure derived from ingested climatology tiles.
Tornado
Downers Grove: 27/100 · Joliet: 81/100
Joliet is 54 points higher.
Downers Grove: Tornado risk derived from NOAA SPC historical reports.
Joliet: Tornado risk derived from NOAA SPC historical reports.
Hail
Downers Grove: 100/100 · Joliet: 96/100
Downers Grove is 4 points higher.
Downers Grove: Hail risk derived from NOAA SPC historical reports.
Joliet: Hail risk derived from NOAA SPC historical reports.
Storm surge
Downers Grove: Unavailable · Joliet: Unavailable
A score difference cannot be calculated without both sources.
Downers Grove: Storm surge model is not available for this location yet.
Joliet: Storm surge model is not available for this location yet.
Wildfire
Downers Grove: 19/100 · Joliet: 21/100
Joliet is 2 points higher.
Downers Grove: Wildfire exposure derived from ingested fire potential tiles.
Joliet: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Downers Grove: 31/100 · Joliet: 28/100
Downers Grove is 3 points higher.
Downers Grove: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Joliet: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.