City vs city
Harrisburg vs Sioux Falls, SD
Harrisburg currently scores 6 points higher overall than Sioux Falls, 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 is a current EPA AirNow signal; 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
Harrisburg: 56/100 · Sioux Falls: 50/100
Harrisburg is 6 points higher.
Flood
Harrisburg: 84/100 · Sioux Falls: 52/100
Harrisburg is 32 points higher.
Harrisburg: FEMA NFHL flood zones: 9 features intersect this tile.
Sioux Falls: FEMA NFHL flood zones: 17 features intersect this tile.
Wind
Harrisburg: 20/100 · Sioux Falls: 20/100
No gap.
Harrisburg: Wind exposure derived from ingested design wind / climatology tiles.
Sioux Falls: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Harrisburg: 43/100 · Sioux Falls: 46/100
Sioux Falls is 3 points higher.
Harrisburg: Lightning exposure derived from ingested climatology tiles.
Sioux Falls: Lightning exposure derived from ingested climatology tiles.
Tornado
Harrisburg: 69/100 · Sioux Falls: 58/100
Harrisburg is 11 points higher.
Harrisburg: Tornado risk derived from NOAA SPC historical reports.
Sioux Falls: Tornado risk derived from NOAA SPC historical reports.
Hail
Harrisburg: 100/100 · Sioux Falls: 100/100
No gap.
Harrisburg: Hail risk derived from NOAA SPC historical reports.
Sioux Falls: Hail risk derived from NOAA SPC historical reports.
Storm surge
Harrisburg: Unavailable · Sioux Falls: Unavailable
A score difference cannot be calculated without both sources.
Harrisburg: Storm surge model is not available for this location yet.
Sioux Falls: Storm surge model is not available for this location yet.
Wildfire
Harrisburg: 53/100 · Sioux Falls: 51/100
Harrisburg is 2 points higher.
Harrisburg: Wildfire exposure derived from ingested fire potential tiles.
Sioux Falls: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Harrisburg: 21/100 · Sioux Falls: 21/100
No gap.
Harrisburg: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Sioux Falls: Air quality signal derived from the latest EPA AirNow combined AQI grid.