City vs city
Gretna vs Louisville, NE
Gretna currently scores 6 points higher overall than Louisville, 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
Gretna: 44/100 · Louisville: 38/100
Gretna is 6 points higher.
Flood
Gretna: 44/100 · Louisville: 38/100
Gretna is 6 points higher.
Gretna: FEMA NFHL flood zones: 6 features intersect this tile.
Louisville: FEMA NFHL flood zones: 3 features intersect this tile.
Wind
Gretna: 19/100 · Louisville: 19/100
No gap.
Gretna: Wind exposure derived from ingested design wind / climatology tiles.
Louisville: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Gretna: 45/100 · Louisville: 47/100
Louisville is 2 points higher.
Gretna: Lightning exposure derived from ingested climatology tiles.
Louisville: Lightning exposure derived from ingested climatology tiles.
Tornado
Gretna: 31/100 · Louisville: 19/100
Gretna is 12 points higher.
Gretna: Tornado risk derived from NOAA SPC historical reports.
Louisville: Tornado risk derived from NOAA SPC historical reports.
Hail
Gretna: 100/100 · Louisville: 80/100
Gretna is 20 points higher.
Gretna: Hail risk derived from NOAA SPC historical reports.
Louisville: Hail risk derived from NOAA SPC historical reports.
Storm surge
Gretna: Unavailable · Louisville: Unavailable
A score difference cannot be calculated without both sources.
Gretna: Storm surge model is not available for this location yet.
Louisville: Storm surge model is not available for this location yet.
Wildfire
Gretna: 49/100 · Louisville: 47/100
Gretna is 2 points higher.
Gretna: Wildfire exposure derived from ingested fire potential tiles.
Louisville: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Gretna: 19/100 · Louisville: 16/100
Gretna is 3 points higher.
Gretna: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Louisville: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.