City vs city
Irmo vs St. Andrews, SC
St. Andrews currently scores 5 points higher overall than Irmo, 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
Irmo: 42/100 · St. Andrews: 47/100
St. Andrews is 5 points higher.
Flood
Irmo: 38/100 · St. Andrews: 33/100
Irmo is 5 points higher.
Irmo: FEMA NFHL flood zones: 10 features intersect this tile.
St. Andrews: FEMA NFHL flood zones: 9 features intersect this tile.
Wind
Irmo: 22/100 · St. Andrews: 23/100
St. Andrews is 1 points higher.
Irmo: Wind exposure derived from ingested design wind / climatology tiles.
St. Andrews: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Irmo: 69/100 · St. Andrews: 69/100
No gap.
Irmo: Lightning exposure derived from ingested climatology tiles.
St. Andrews: Lightning exposure derived from ingested climatology tiles.
Tornado
Irmo: 19/100 · St. Andrews: 8/100
Irmo is 11 points higher.
Irmo: Tornado risk derived from NOAA SPC historical reports.
St. Andrews: Tornado risk derived from NOAA SPC historical reports.
Hail
Irmo: 49/100 · St. Andrews: 100/100
St. Andrews is 51 points higher.
Irmo: Hail risk derived from NOAA SPC historical reports.
St. Andrews: Hail risk derived from NOAA SPC historical reports.
Storm surge
Irmo: Unavailable · St. Andrews: Unavailable
A score difference cannot be calculated without both sources.
Irmo: Storm surge model is not available for this location yet.
St. Andrews: Storm surge model is not available for this location yet.
Wildfire
Irmo: 68/100 · St. Andrews: 71/100
St. Andrews is 3 points higher.
Irmo: Wildfire exposure derived from ingested fire potential tiles.
St. Andrews: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Irmo: 27/100 · St. Andrews: 27/100
No gap.
Irmo: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
St. Andrews: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.