City vs city
Bryn Athyn vs Willow Grove, PA
Willow Grove currently scores 3 points higher overall than Bryn Athyn, with the largest gap in tornado.
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
Bryn Athyn: 39/100 · Willow Grove: 42/100
Willow Grove is 3 points higher.
Flood
Bryn Athyn: 66/100 · Willow Grove: 74/100
Willow Grove is 8 points higher.
Bryn Athyn: FEMA NFHL flood zones: 11 features intersect this tile.
Willow Grove: FEMA NFHL flood zones: 10 features intersect this tile.
Wind
Bryn Athyn: 22/100 · Willow Grove: 22/100
No gap.
Bryn Athyn: Wind exposure derived from ingested design wind / climatology tiles.
Willow Grove: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Bryn Athyn: 31/100 · Willow Grove: 33/100
Willow Grove is 2 points higher.
Bryn Athyn: Lightning exposure derived from ingested climatology tiles.
Willow Grove: Lightning exposure derived from ingested climatology tiles.
Tornado
Bryn Athyn: 46/100 · Willow Grove: 0/100
Bryn Athyn is 46 points higher.
Bryn Athyn: Tornado risk derived from NOAA SPC historical reports.
Willow Grove: Tornado risk derived from NOAA SPC historical reports.
Hail
Bryn Athyn: 15/100 · Willow Grove: 35/100
Willow Grove is 20 points higher.
Bryn Athyn: Hail risk derived from NOAA SPC historical reports.
Willow Grove: Hail risk derived from NOAA SPC historical reports.
Storm surge
Bryn Athyn: Unavailable · Willow Grove: Unavailable
A score difference cannot be calculated without both sources.
Bryn Athyn: Storm surge model is not available for this location yet.
Willow Grove: Storm surge model is not available for this location yet.
Wildfire
Bryn Athyn: 53/100 · Willow Grove: 49/100
Bryn Athyn is 4 points higher.
Bryn Athyn: Wildfire exposure derived from ingested fire potential tiles.
Willow Grove: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Bryn Athyn: 39/100 · Willow Grove: 40/100
Willow Grove is 1 points higher.
Bryn Athyn: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Willow Grove: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.