City vs city
North Walpole vs Portsmouth, NH
Portsmouth currently scores 14 points higher overall than North Walpole, 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 is a current EPA AirNow signal; 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
North Walpole: 27/100 · Portsmouth: 41/100
Portsmouth is 14 points higher.
Flood
North Walpole: 43/100 · Portsmouth: 73/100
Portsmouth is 30 points higher.
North Walpole: FEMA NFHL flood zones: 4 features intersect this tile.
Portsmouth: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
North Walpole: 18/100 · Portsmouth: 23/100
Portsmouth is 5 points higher.
North Walpole: Wind exposure derived from ingested design wind / climatology tiles.
Portsmouth: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
North Walpole: 20/100 · Portsmouth: 6/100
North Walpole is 14 points higher.
North Walpole: Lightning exposure derived from ingested climatology tiles.
Portsmouth: Lightning exposure derived from ingested climatology tiles.
Tornado
North Walpole: 8/100 · Portsmouth: 0/100
North Walpole is 8 points higher.
North Walpole: Tornado risk derived from NOAA SPC historical reports.
Portsmouth: Tornado risk derived from NOAA SPC historical reports.
Hail
North Walpole: 42/100 · Portsmouth: 22/100
North Walpole is 20 points higher.
North Walpole: Hail risk derived from NOAA SPC historical reports.
Portsmouth: Hail risk derived from NOAA SPC historical reports.
Storm surge
North Walpole: Unavailable · Portsmouth: 98/100
A score difference cannot be calculated without both sources.
North Walpole: Storm surge model is not available for this location yet.
Portsmouth: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
North Walpole: 34/100 · Portsmouth: 43/100
Portsmouth is 9 points higher.
North Walpole: Wildfire exposure derived from ingested fire potential tiles.
Portsmouth: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
North Walpole: 22/100 · Portsmouth: 23/100
Portsmouth is 1 points higher.
North Walpole: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Portsmouth: Air quality signal derived from the latest EPA AirNow combined AQI grid.