City vs city
Columbia vs Marietta, PA
Marietta currently scores 3 points higher overall than Columbia, 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
Columbia: 37/100 · Marietta: 40/100
Marietta is 3 points higher.
Flood
Columbia: 64/100 · Marietta: 98/100
Marietta is 34 points higher.
Columbia: FEMA NFHL flood zones: 2 features intersect this tile.
Marietta: FEMA NFHL flood zones: 9 features intersect this tile.
Wind
Columbia: 21/100 · Marietta: 21/100
No gap.
Columbia: Wind exposure derived from ingested design wind / climatology tiles.
Marietta: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Columbia: 45/100 · Marietta: 43/100
Columbia is 2 points higher.
Columbia: Lightning exposure derived from ingested climatology tiles.
Marietta: Lightning exposure derived from ingested climatology tiles.
Tornado
Columbia: 15/100 · Marietta: 8/100
Columbia is 7 points higher.
Columbia: Tornado risk derived from NOAA SPC historical reports.
Marietta: Tornado risk derived from NOAA SPC historical reports.
Hail
Columbia: 34/100 · Marietta: 56/100
Marietta is 22 points higher.
Columbia: Hail risk derived from NOAA SPC historical reports.
Marietta: Hail risk derived from NOAA SPC historical reports.
Storm surge
Columbia: Unavailable · Marietta: Unavailable
A score difference cannot be calculated without both sources.
Columbia: Storm surge model is not available for this location yet.
Marietta: Storm surge model is not available for this location yet.
Wildfire
Columbia: 38/100 · Marietta: 11/100
Columbia is 27 points higher.
Columbia: Wildfire exposure derived from ingested fire potential tiles.
Marietta: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Columbia: 44/100 · Marietta: 44/100
No gap.
Columbia: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
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.