City vs city
Derry vs Greensburg, PA
Derry currently scores 7 points higher overall than Greensburg, 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
Derry: 42/100 · Greensburg: 35/100
Derry is 7 points higher.
Flood
Derry: 60/100 · Greensburg: 68/100
Greensburg is 8 points higher.
Derry: FEMA NFHL flood zones: 2 features intersect this tile.
Greensburg: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Derry: 18/100 · Greensburg: 18/100
No gap.
Derry: Wind exposure derived from ingested design wind / climatology tiles.
Greensburg: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Derry: 27/100 · Greensburg: 26/100
Derry is 1 points higher.
Derry: Lightning exposure derived from ingested climatology tiles.
Greensburg: Lightning exposure derived from ingested climatology tiles.
Tornado
Derry: 42/100 · Greensburg: 15/100
Derry is 27 points higher.
Derry: Tornado risk derived from NOAA SPC historical reports.
Greensburg: Tornado risk derived from NOAA SPC historical reports.
Hail
Derry: 60/100 · Greensburg: 37/100
Derry is 23 points higher.
Derry: Hail risk derived from NOAA SPC historical reports.
Greensburg: Hail risk derived from NOAA SPC historical reports.
Storm surge
Derry: Unavailable · Greensburg: Unavailable
A score difference cannot be calculated without both sources.
Derry: Storm surge model is not available for this location yet.
Greensburg: Storm surge model is not available for this location yet.
Wildfire
Derry: 43/100 · Greensburg: 42/100
Derry is 1 points higher.
Derry: Wildfire exposure derived from ingested fire potential tiles.
Greensburg: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Derry: 42/100 · Greensburg: 42/100
No gap.
Derry: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Greensburg: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.