City vs city
Alexandria vs Spencer, SD
Spencer currently scores 6 points higher overall than Alexandria, with the largest gap in tornado.
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
Alexandria: 38/100 · Spencer: 44/100
Spencer is 6 points higher.
Flood
Alexandria: 52/100 · Spencer: 47/100
Alexandria is 5 points higher.
Alexandria: FEMA NFHL flood zones: 14 features intersect this tile.
Spencer: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Alexandria: 21/100 · Spencer: 21/100
No gap.
Alexandria: Wind exposure derived from ingested design wind / climatology tiles.
Spencer: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Alexandria: 52/100 · Spencer: 57/100
Spencer is 5 points higher.
Alexandria: Lightning exposure derived from ingested climatology tiles.
Spencer: Lightning exposure derived from ingested climatology tiles.
Tornado
Alexandria: 27/100 · Spencer: 50/100
Spencer is 23 points higher.
Alexandria: Tornado risk derived from NOAA SPC historical reports.
Spencer: Tornado risk derived from NOAA SPC historical reports.
Hail
Alexandria: 61/100 · Spencer: 71/100
Spencer is 10 points higher.
Alexandria: Hail risk derived from NOAA SPC historical reports.
Spencer: Hail risk derived from NOAA SPC historical reports.
Storm surge
Alexandria: Unavailable · Spencer: Unavailable
A score difference cannot be calculated without both sources.
Alexandria: Storm surge model is not available for this location yet.
Spencer: Storm surge model is not available for this location yet.
Wildfire
Alexandria: 42/100 · Spencer: 42/100
No gap.
Alexandria: Wildfire exposure derived from ingested fire potential tiles.
Spencer: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Alexandria: 12/100 · Spencer: 21/100
Spencer is 9 points higher.
Alexandria: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Spencer: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.