City vs city
Marietta vs Mount Joy, PA
Marietta currently scores 1 points higher overall than Mount Joy, 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
Marietta: 40/100 · Mount Joy: 39/100
Marietta is 1 points higher.
Flood
Marietta: 98/100 · Mount Joy: 66/100
Marietta is 32 points higher.
Marietta: FEMA NFHL flood zones: 9 features intersect this tile.
Mount Joy: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Marietta: 21/100 · Mount Joy: 21/100
No gap.
Marietta: Wind exposure derived from ingested design wind / climatology tiles.
Mount Joy: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Marietta: 43/100 · Mount Joy: 42/100
Marietta is 1 points higher.
Marietta: Lightning exposure derived from ingested climatology tiles.
Mount Joy: Lightning exposure derived from ingested climatology tiles.
Tornado
Marietta: 8/100 · Mount Joy: 0/100
Marietta is 8 points higher.
Marietta: Tornado risk derived from NOAA SPC historical reports.
Mount Joy: Tornado risk derived from NOAA SPC historical reports.
Hail
Marietta: 56/100 · Mount Joy: 33/100
Marietta is 23 points higher.
Marietta: Hail risk derived from NOAA SPC historical reports.
Mount Joy: Hail risk derived from NOAA SPC historical reports.
Storm surge
Marietta: Unavailable · Mount Joy: Unavailable
A score difference cannot be calculated without both sources.
Marietta: Storm surge model is not available for this location yet.
Mount Joy: Storm surge model is not available for this location yet.
Wildfire
Marietta: 11/100 · Mount Joy: 27/100
Mount Joy is 16 points higher.
Marietta: Wildfire exposure derived from ingested fire potential tiles.
Mount Joy: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Marietta: 44/100 · Mount Joy: 43/100
Marietta is 1 points higher.
Marietta: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Mount Joy: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.