City vs city
North Haverhill vs Portsmouth, NH
Portsmouth currently scores 16 points higher overall than North Haverhill, 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 Haverhill: 25/100 · Portsmouth: 41/100
Portsmouth is 16 points higher.
Flood
North Haverhill: 46/100 · Portsmouth: 73/100
Portsmouth is 27 points higher.
North Haverhill: FEMA NFHL flood zones: 2 features intersect this tile.
Portsmouth: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
North Haverhill: 17/100 · Portsmouth: 23/100
Portsmouth is 6 points higher.
North Haverhill: Wind exposure derived from ingested design wind / climatology tiles.
Portsmouth: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
North Haverhill: 17/100 · Portsmouth: 6/100
North Haverhill is 11 points higher.
North Haverhill: Lightning exposure derived from ingested climatology tiles.
Portsmouth: Lightning exposure derived from ingested climatology tiles.
Tornado
North Haverhill: 15/100 · Portsmouth: 0/100
North Haverhill is 15 points higher.
North Haverhill: Tornado risk derived from NOAA SPC historical reports.
Portsmouth: Tornado risk derived from NOAA SPC historical reports.
Hail
North Haverhill: 17/100 · Portsmouth: 22/100
Portsmouth is 5 points higher.
North Haverhill: Hail risk derived from NOAA SPC historical reports.
Portsmouth: Hail risk derived from NOAA SPC historical reports.
Storm surge
North Haverhill: Unavailable · Portsmouth: 98/100
A score difference cannot be calculated without both sources.
North Haverhill: Storm surge model is not available for this location yet.
Portsmouth: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
North Haverhill: 42/100 · Portsmouth: 43/100
Portsmouth is 1 points higher.
North Haverhill: Wildfire exposure derived from ingested fire potential tiles.
Portsmouth: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
North Haverhill: 21/100 · Portsmouth: 23/100
Portsmouth is 2 points higher.
North Haverhill: 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.