City vs city
Grand Bay vs Semmes, AL
Semmes currently scores 6 points higher overall than Grand Bay, 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
Grand Bay: 48/100 · Semmes: 54/100
Semmes is 6 points higher.
Flood
Grand Bay: 0/100 · Semmes: 32/100
Semmes is 32 points higher.
Grand Bay: FEMA NFHL flood zones: 0 features intersect this tile.
Semmes: FEMA NFHL flood zones: 5 features intersect this tile.
Wind
Grand Bay: 64/100 · Semmes: 58/100
Grand Bay is 6 points higher.
Grand Bay: Wind exposure derived from ingested design wind / climatology tiles.
Semmes: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Grand Bay: 81/100 · Semmes: 90/100
Semmes is 9 points higher.
Grand Bay: Lightning exposure derived from ingested climatology tiles.
Semmes: Lightning exposure derived from ingested climatology tiles.
Tornado
Grand Bay: 0/100 · Semmes: 38/100
Semmes is 38 points higher.
Grand Bay: Tornado risk derived from NOAA SPC historical reports.
Semmes: Tornado risk derived from NOAA SPC historical reports.
Hail
Grand Bay: 25/100 · Semmes: 71/100
Semmes is 46 points higher.
Grand Bay: Hail risk derived from NOAA SPC historical reports.
Semmes: Hail risk derived from NOAA SPC historical reports.
Storm surge
Grand Bay: 93/100 · Semmes: Unavailable
A score difference cannot be calculated without both sources.
Grand Bay: Storm surge exposure derived from NOAA SLOSH MOM (AGL) data.
Semmes: Storm surge model is not available for this location yet.
Wildfire
Grand Bay: 51/100 · Semmes: 67/100
Semmes is 16 points higher.
Grand Bay: Wildfire exposure derived from ingested fire potential tiles.
Semmes: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Grand Bay: 20/100 · Semmes: 22/100
Semmes is 2 points higher.
Grand Bay: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Semmes: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.