City vs city
Mercersburg vs Philadelphia, PA
Philadelphia currently scores 5 points higher overall than Mercersburg, 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 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
Mercersburg: 32/100 · Philadelphia: 37/100
Philadelphia is 5 points higher.
Flood
Mercersburg: 62/100 · Philadelphia: 60/100
Mercersburg is 2 points higher.
Mercersburg: FEMA NFHL flood zones: 3 features intersect this tile.
Philadelphia: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Mercersburg: 19/100 · Philadelphia: 22/100
Philadelphia is 3 points higher.
Mercersburg: Wind exposure derived from ingested design wind / climatology tiles.
Philadelphia: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Mercersburg: 23/100 · Philadelphia: 37/100
Philadelphia is 14 points higher.
Mercersburg: Lightning exposure derived from ingested climatology tiles.
Philadelphia: Lightning exposure derived from ingested climatology tiles.
Tornado
Mercersburg: 0/100 · Philadelphia: 15/100
Philadelphia is 15 points higher.
Mercersburg: Tornado risk derived from NOAA SPC historical reports.
Philadelphia: Tornado risk derived from NOAA SPC historical reports.
Hail
Mercersburg: 10/100 · Philadelphia: 43/100
Philadelphia is 33 points higher.
Mercersburg: Hail risk derived from NOAA SPC historical reports.
Philadelphia: Hail risk derived from NOAA SPC historical reports.
Storm surge
Mercersburg: Unavailable · Philadelphia: Unavailable
A score difference cannot be calculated without both sources.
Mercersburg: Storm surge model is not available for this location yet.
Philadelphia: Storm surge model is not available for this location yet.
Wildfire
Mercersburg: 34/100 · Philadelphia: 36/100
Philadelphia is 2 points higher.
Mercersburg: Wildfire exposure derived from ingested fire potential tiles.
Philadelphia: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Mercersburg: 42/100 · Philadelphia: 46/100
Philadelphia is 4 points higher.
Mercersburg: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Philadelphia: Air quality signal derived from the latest EPA AirNow combined AQI grid.