City vs city
Castle Shannon vs Mount Oliver, PA
Mount Oliver currently scores 10 points higher overall than Castle Shannon, 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
Castle Shannon: 35/100 · Mount Oliver: 45/100
Mount Oliver is 10 points higher.
Flood
Castle Shannon: 60/100 · Mount Oliver: 76/100
Mount Oliver is 16 points higher.
Castle Shannon: FEMA NFHL flood zones: 4 features intersect this tile.
Mount Oliver: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Castle Shannon: 18/100 · Mount Oliver: 18/100
No gap.
Castle Shannon: Wind exposure derived from ingested design wind / climatology tiles.
Mount Oliver: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Castle Shannon: 23/100 · Mount Oliver: 26/100
Mount Oliver is 3 points higher.
Castle Shannon: Lightning exposure derived from ingested climatology tiles.
Mount Oliver: Lightning exposure derived from ingested climatology tiles.
Tornado
Castle Shannon: 8/100 · Mount Oliver: 19/100
Mount Oliver is 11 points higher.
Castle Shannon: Tornado risk derived from NOAA SPC historical reports.
Mount Oliver: Tornado risk derived from NOAA SPC historical reports.
Hail
Castle Shannon: 64/100 · Mount Oliver: 100/100
Mount Oliver is 36 points higher.
Castle Shannon: Hail risk derived from NOAA SPC historical reports.
Mount Oliver: Hail risk derived from NOAA SPC historical reports.
Storm surge
Castle Shannon: Unavailable · Mount Oliver: Unavailable
A score difference cannot be calculated without both sources.
Castle Shannon: Storm surge model is not available for this location yet.
Mount Oliver: Storm surge model is not available for this location yet.
Wildfire
Castle Shannon: 34/100 · Mount Oliver: 36/100
Mount Oliver is 2 points higher.
Castle Shannon: Wildfire exposure derived from ingested fire potential tiles.
Mount Oliver: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Castle Shannon: 39/100 · Mount Oliver: 40/100
Mount Oliver is 1 points higher.
Castle Shannon: 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 Oliver: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.