City vs city
Frederick vs Perry Hall, MD
Frederick currently scores 5 points higher overall than Perry Hall, with the largest gap in hail.
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
Frederick: 35/100 · Perry Hall: 30/100
Frederick is 5 points higher.
Flood
Frederick: 20/100 · Perry Hall: 21/100
Perry Hall is 1 points higher.
Frederick: FEMA NFHL flood zones: 3 features intersect this tile.
Perry Hall: FEMA NFHL flood zones: 6 features intersect this tile.
Wind
Frederick: 20/100 · Perry Hall: 21/100
Perry Hall is 1 points higher.
Frederick: Wind exposure derived from ingested design wind / climatology tiles.
Perry Hall: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Frederick: 26/100 · Perry Hall: 40/100
Perry Hall is 14 points higher.
Frederick: Lightning exposure derived from ingested climatology tiles.
Perry Hall: Lightning exposure derived from ingested climatology tiles.
Tornado
Frederick: 15/100 · Perry Hall: 23/100
Perry Hall is 8 points higher.
Frederick: Tornado risk derived from NOAA SPC historical reports.
Perry Hall: Tornado risk derived from NOAA SPC historical reports.
Hail
Frederick: 74/100 · Perry Hall: 24/100
Frederick is 50 points higher.
Frederick: Hail risk derived from NOAA SPC historical reports.
Perry Hall: Hail risk derived from NOAA SPC historical reports.
Storm surge
Frederick: Unavailable · Perry Hall: Unavailable
A score difference cannot be calculated without both sources.
Frederick: Storm surge model is not available for this location yet.
Perry Hall: Storm surge model is not available for this location yet.
Wildfire
Frederick: 47/100 · Perry Hall: 39/100
Frederick is 8 points higher.
Frederick: Wildfire exposure derived from ingested fire potential tiles.
Perry Hall: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Frederick: 42/100 · Perry Hall: 42/100
No gap.
Frederick: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Perry Hall: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.