City vs city
Grafton vs Green Harbor, MA
Green Harbor currently scores 5 points higher overall than Grafton, 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
Grafton: 33/100 · Green Harbor: 38/100
Green Harbor is 5 points higher.
Flood
Grafton: 38/100 · Green Harbor: 97/100
Green Harbor is 59 points higher.
Grafton: FEMA NFHL flood zones: 9 features intersect this tile.
Green Harbor: FEMA NFHL flood zones: 25 features intersect this tile.
Wind
Grafton: 26/100 · Green Harbor: 32/100
Green Harbor is 6 points higher.
Grafton: Wind exposure derived from ingested design wind / climatology tiles.
Green Harbor: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grafton: 9/100 · Green Harbor: 12/100
Green Harbor is 3 points higher.
Grafton: Lightning exposure derived from ingested climatology tiles.
Green Harbor: Lightning exposure derived from ingested climatology tiles.
Tornado
Grafton: 0/100 · Green Harbor: 4/100
Green Harbor is 4 points higher.
Grafton: Tornado risk derived from NOAA SPC historical reports.
Green Harbor: Tornado risk derived from NOAA SPC historical reports.
Hail
Grafton: 38/100 · Green Harbor: 25/100
Grafton is 13 points higher.
Grafton: Hail risk derived from NOAA SPC historical reports.
Green Harbor: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grafton: Unavailable · Green Harbor: 95/100
A score difference cannot be calculated without both sources.
Grafton: Storm surge model is not available for this location yet.
Green Harbor: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Grafton: 57/100 · Green Harbor: 12/100
Grafton is 45 points higher.
Grafton: Wildfire exposure derived from ingested fire potential tiles.
Green Harbor: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grafton: 27/100 · Green Harbor: 26/100
Grafton is 1 points higher.
Grafton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Green Harbor: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.