City vs city
Larchwood vs Rock Valley, IA
Rock Valley currently scores 6 points higher overall than Larchwood, with the largest gap in hail.
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
Larchwood: 41/100 · Rock Valley: 47/100
Rock Valley is 6 points higher.
Flood
Larchwood: 60/100 · Rock Valley: 67/100
Rock Valley is 7 points higher.
Larchwood: FEMA NFHL flood zones: 3 features intersect this tile.
Rock Valley: FEMA NFHL flood zones: 11 features intersect this tile.
Wind
Larchwood: 20/100 · Rock Valley: 20/100
No gap.
Larchwood: Wind exposure derived from ingested design wind / climatology tiles.
Rock Valley: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Larchwood: 44/100 · Rock Valley: 48/100
Rock Valley is 4 points higher.
Larchwood: Lightning exposure derived from ingested climatology tiles.
Rock Valley: Lightning exposure derived from ingested climatology tiles.
Tornado
Larchwood: 23/100 · Rock Valley: 35/100
Rock Valley is 12 points higher.
Larchwood: Tornado risk derived from NOAA SPC historical reports.
Rock Valley: Tornado risk derived from NOAA SPC historical reports.
Hail
Larchwood: 75/100 · Rock Valley: 100/100
Rock Valley is 25 points higher.
Larchwood: Hail risk derived from NOAA SPC historical reports.
Rock Valley: Hail risk derived from NOAA SPC historical reports.
Storm surge
Larchwood: Unavailable · Rock Valley: Unavailable
A score difference cannot be calculated without both sources.
Larchwood: Storm surge model is not available for this location yet.
Rock Valley: Storm surge model is not available for this location yet.
Wildfire
Larchwood: 43/100 · Rock Valley: 39/100
Larchwood is 4 points higher.
Larchwood: Wildfire exposure derived from ingested fire potential tiles.
Rock Valley: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Larchwood: 21/100 · Rock Valley: 22/100
Rock Valley is 1 points higher.
Larchwood: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
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.