City vs city
Gretna vs Waterloo, NE
Waterloo currently scores 1 points higher overall than Gretna, 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
Gretna: 44/100 · Waterloo: 45/100
Waterloo is 1 points higher.
Flood
Gretna: 44/100 · Waterloo: 67/100
Waterloo is 23 points higher.
Gretna: FEMA NFHL flood zones: 6 features intersect this tile.
Waterloo: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
Gretna: 19/100 · Waterloo: 19/100
No gap.
Gretna: Wind exposure derived from ingested design wind / climatology tiles.
Waterloo: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Gretna: 45/100 · Waterloo: 44/100
Gretna is 1 points higher.
Gretna: Lightning exposure derived from ingested climatology tiles.
Waterloo: Lightning exposure derived from ingested climatology tiles.
Tornado
Gretna: 31/100 · Waterloo: 15/100
Gretna is 16 points higher.
Gretna: Tornado risk derived from NOAA SPC historical reports.
Waterloo: Tornado risk derived from NOAA SPC historical reports.
Hail
Gretna: 100/100 · Waterloo: 100/100
No gap.
Gretna: Hail risk derived from NOAA SPC historical reports.
Waterloo: Hail risk derived from NOAA SPC historical reports.
Storm surge
Gretna: Unavailable · Waterloo: Unavailable
A score difference cannot be calculated without both sources.
Gretna: Storm surge model is not available for this location yet.
Waterloo: Storm surge model is not available for this location yet.
Wildfire
Gretna: 49/100 · Waterloo: 54/100
Waterloo is 5 points higher.
Gretna: Wildfire exposure derived from ingested fire potential tiles.
Waterloo: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Gretna: 19/100 · Waterloo: 19/100
No gap.
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.
Waterloo: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.