City vs city
Galliano vs Grand Isle, LA
Grand Isle currently scores 1 points higher overall than Galliano, 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
Galliano: 35/100 · Grand Isle: 36/100
Grand Isle is 1 points higher.
Flood
Galliano: 0/100 · Grand Isle: 25/100
Grand Isle is 25 points higher.
Galliano: FEMA NFHL flood zones: 0 features intersect this tile.
Grand Isle: FEMA NFHL flood zones: 7 features intersect this tile.
Wind
Galliano: 61/100 · Grand Isle: 66/100
Grand Isle is 5 points higher.
Galliano: Wind exposure derived from ingested design wind / climatology tiles.
Grand Isle: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Galliano: 71/100 · Grand Isle: 61/100
Galliano is 10 points higher.
Galliano: Lightning exposure derived from ingested climatology tiles.
Grand Isle: Lightning exposure derived from ingested climatology tiles.
Tornado
Galliano: 8/100 · Grand Isle: 12/100
Grand Isle is 4 points higher.
Galliano: Tornado risk derived from NOAA SPC historical reports.
Grand Isle: Tornado risk derived from NOAA SPC historical reports.
Hail
Galliano: 9/100 · Grand Isle: 7/100
Galliano is 2 points higher.
Galliano: Hail risk derived from NOAA SPC historical reports.
Grand Isle: Hail risk derived from NOAA SPC historical reports.
Storm surge
Galliano: 96/100 · Grand Isle: 94/100
Galliano is 2 points higher.
Galliano: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Grand Isle: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Wildfire
Galliano: 13/100 · Grand Isle: 3/100
Galliano is 10 points higher.
Galliano: Wildfire exposure derived from ingested fire potential tiles.
Grand Isle: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Galliano: 20/100 · Grand Isle: 22/100
Grand Isle is 2 points higher.
Galliano: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Grand Isle: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.