City vs city
Grafton vs Harwich Port, MA
Grafton currently scores 7 points higher overall than Harwich Port, with the largest gap in wildfire.
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 · Harwich Port: 26/100
Grafton is 7 points higher.
Flood
Grafton: 38/100 · Harwich Port: 29/100
Grafton is 9 points higher.
Grafton: FEMA NFHL flood zones: 9 features intersect this tile.
Harwich Port: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Grafton: 26/100 · Harwich Port: 38/100
Harwich Port is 12 points higher.
Grafton: Wind exposure derived from ingested design wind / climatology tiles.
Harwich Port: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grafton: 9/100 · Harwich Port: 8/100
Grafton is 1 points higher.
Grafton: Lightning exposure derived from ingested climatology tiles.
Harwich Port: Lightning exposure derived from ingested climatology tiles.
Tornado
Grafton: 0/100 · Harwich Port: 8/100
Harwich Port is 8 points higher.
Grafton: Tornado risk derived from NOAA SPC historical reports.
Harwich Port: Tornado risk derived from NOAA SPC historical reports.
Hail
Grafton: 38/100 · Harwich Port: 6/100
Grafton is 32 points higher.
Grafton: Hail risk derived from NOAA SPC historical reports.
Harwich Port: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grafton: Unavailable · Harwich Port: 95/100
A score difference cannot be calculated without both sources.
Grafton: Storm surge model is not available for this location yet.
Harwich Port: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Grafton: 57/100 · Harwich Port: 5/100
Grafton is 52 points higher.
Grafton: Wildfire exposure derived from ingested fire potential tiles.
Harwich Port: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grafton: 27/100 · Harwich Port: 21/100
Grafton is 6 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.
Harwich Port: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.