City vs city
Portsmouth vs West Chesterfield, NH
Portsmouth currently scores 22 points higher overall than West Chesterfield, 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
Portsmouth: 41/100 · West Chesterfield: 19/100
Portsmouth is 22 points higher.
Flood
Portsmouth: 73/100 · West Chesterfield: 5/100
Portsmouth is 68 points higher.
Portsmouth: FEMA NFHL flood zones: 12 features intersect this tile.
West Chesterfield: FEMA NFHL flood zones: 1 features intersect this tile.
Wind
Portsmouth: 23/100 · West Chesterfield: 19/100
Portsmouth is 4 points higher.
Portsmouth: Wind exposure derived from ingested design wind / climatology tiles.
West Chesterfield: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Portsmouth: 6/100 · West Chesterfield: 15/100
West Chesterfield is 9 points higher.
Portsmouth: Lightning exposure derived from ingested climatology tiles.
West Chesterfield: Lightning exposure derived from ingested climatology tiles.
Tornado
Portsmouth: 0/100 · West Chesterfield: 8/100
West Chesterfield is 8 points higher.
Portsmouth: Tornado risk derived from NOAA SPC historical reports.
West Chesterfield: Tornado risk derived from NOAA SPC historical reports.
Hail
Portsmouth: 22/100 · West Chesterfield: 31/100
West Chesterfield is 9 points higher.
Portsmouth: Hail risk derived from NOAA SPC historical reports.
West Chesterfield: Hail risk derived from NOAA SPC historical reports.
Storm surge
Portsmouth: 98/100 · West Chesterfield: Unavailable
A score difference cannot be calculated without both sources.
Portsmouth: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
West Chesterfield: Storm surge model is not available for this location yet.
Wildfire
Portsmouth: 43/100 · West Chesterfield: 36/100
Portsmouth is 7 points higher.
Portsmouth: Wildfire exposure derived from ingested fire potential tiles.
West Chesterfield: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Portsmouth: 23/100 · West Chesterfield: 22/100
Portsmouth is 1 points higher.
Portsmouth: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
West Chesterfield: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.