City vs city
Keystone vs Yankton, SD
Keystone currently scores 1 points higher overall than Yankton, 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 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
Keystone: 49/100 · Yankton: 48/100
Keystone is 1 points higher.
Flood
Keystone: 44/100 · Yankton: 50/100
Yankton is 6 points higher.
Keystone: FEMA NFHL flood zones: 4 features intersect this tile.
Yankton: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Keystone: 19/100 · Yankton: 21/100
Yankton is 2 points higher.
Keystone: Wind exposure derived from ingested design wind / climatology tiles.
Yankton: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Keystone: 27/100 · Yankton: 32/100
Yankton is 5 points higher.
Keystone: Lightning exposure derived from ingested climatology tiles.
Yankton: Lightning exposure derived from ingested climatology tiles.
Tornado
Keystone: 0/100 · Yankton: 31/100
Yankton is 31 points higher.
Keystone: Tornado risk derived from NOAA SPC historical reports.
Yankton: Tornado risk derived from NOAA SPC historical reports.
Hail
Keystone: 100/100 · Yankton: 100/100
No gap.
Keystone: Hail risk derived from NOAA SPC historical reports.
Yankton: Hail risk derived from NOAA SPC historical reports.
Storm surge
Keystone: Unavailable · Yankton: Unavailable
A score difference cannot be calculated without both sources.
Keystone: Storm surge model is not available for this location yet.
Yankton: Storm surge model is not available for this location yet.
Wildfire
Keystone: 69/100 · Yankton: 54/100
Keystone is 15 points higher.
Keystone: Wildfire exposure derived from ingested fire potential tiles.
Yankton: Wildfire exposure derived from ingested fire potential tiles.
Current air quality
Keystone: 35/100 · Yankton: Unavailable
A score difference cannot be calculated without both sources.
Keystone: Air quality signal derived from the latest EPA AirNow combined AQI grid.
Yankton: Air quality model is not available for this location yet.