City vs city
Rock Valley vs Waterloo, IA
Rock Valley currently scores 6 points higher overall than Waterloo, 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
Rock Valley: 47/100 · Waterloo: 41/100
Rock Valley is 6 points higher.
Flood
Rock Valley: 67/100 · Waterloo: 66/100
Rock Valley is 1 points higher.
Rock Valley: FEMA NFHL flood zones: 11 features intersect this tile.
Waterloo: FEMA NFHL flood zones: 17 features intersect this tile.
Wind
Rock Valley: 20/100 · Waterloo: 18/100
Rock Valley is 2 points higher.
Rock Valley: Wind exposure derived from ingested design wind / climatology tiles.
Waterloo: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Rock Valley: 48/100 · Waterloo: 30/100
Rock Valley is 18 points higher.
Rock Valley: Lightning exposure derived from ingested climatology tiles.
Waterloo: Lightning exposure derived from ingested climatology tiles.
Tornado
Rock Valley: 35/100 · Waterloo: 15/100
Rock Valley is 20 points higher.
Rock Valley: Tornado risk derived from NOAA SPC historical reports.
Waterloo: Tornado risk derived from NOAA SPC historical reports.
Hail
Rock Valley: 100/100 · Waterloo: 100/100
No gap.
Rock Valley: Hail risk derived from NOAA SPC historical reports.
Waterloo: Hail risk derived from NOAA SPC historical reports.
Storm surge
Rock Valley: Unavailable · Waterloo: Unavailable
A score difference cannot be calculated without both sources.
Rock Valley: Storm surge model is not available for this location yet.
Waterloo: Storm surge model is not available for this location yet.
Wildfire
Rock Valley: 39/100 · Waterloo: 34/100
Rock Valley is 5 points higher.
Rock Valley: Wildfire exposure derived from ingested fire potential tiles.
Waterloo: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Rock Valley: 22/100 · Waterloo: 21/100
Rock Valley is 1 points higher.
Rock Valley: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Waterloo: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.