City vs city
Nashua vs Rochester, NH
Nashua currently scores 2 points higher overall than Rochester, 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
Nashua: 34/100 · Rochester: 32/100
Nashua is 2 points higher.
Flood
Nashua: 77/100 · Rochester: 64/100
Nashua is 13 points higher.
Nashua: FEMA NFHL flood zones: 26 features intersect this tile.
Rochester: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
Nashua: 23/100 · Rochester: 21/100
Nashua is 2 points higher.
Nashua: Wind exposure derived from ingested design wind / climatology tiles.
Rochester: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Nashua: 7/100 · Rochester: 7/100
No gap.
Nashua: Lightning exposure derived from ingested climatology tiles.
Rochester: Lightning exposure derived from ingested climatology tiles.
Tornado
Nashua: 15/100 · Rochester: 15/100
No gap.
Nashua: Tornado risk derived from NOAA SPC historical reports.
Rochester: Tornado risk derived from NOAA SPC historical reports.
Hail
Nashua: 51/100 · Rochester: 61/100
Rochester is 10 points higher.
Nashua: Hail risk derived from NOAA SPC historical reports.
Rochester: Hail risk derived from NOAA SPC historical reports.
Storm surge
Nashua: Unavailable · Rochester: Unavailable
A score difference cannot be calculated without both sources.
Nashua: Storm surge model is not available for this location yet.
Rochester: Storm surge model is not available for this location yet.
Wildfire
Nashua: 42/100 · Rochester: 36/100
Nashua is 6 points higher.
Nashua: Wildfire exposure derived from ingested fire potential tiles.
Rochester: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Nashua: 21/100 · Rochester: 23/100
Rochester is 2 points higher.
Nashua: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Rochester: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.