City vs city
Chester vs Watertown, SD
Watertown currently scores 5 points higher overall than Chester, 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
Chester: 45/100 · Watertown: 50/100
Watertown is 5 points higher.
Flood
Chester: 56/100 · Watertown: 79/100
Watertown is 23 points higher.
Chester: FEMA NFHL flood zones: 12 features intersect this tile.
Watertown: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Chester: 20/100 · Watertown: 20/100
No gap.
Chester: Wind exposure derived from ingested design wind / climatology tiles.
Watertown: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Chester: 60/100 · Watertown: 42/100
Chester is 18 points higher.
Chester: Lightning exposure derived from ingested climatology tiles.
Watertown: Lightning exposure derived from ingested climatology tiles.
Tornado
Chester: 62/100 · Watertown: 0/100
Chester is 62 points higher.
Chester: Tornado risk derived from NOAA SPC historical reports.
Watertown: Tornado risk derived from NOAA SPC historical reports.
Hail
Chester: 60/100 · Watertown: 100/100
Watertown is 40 points higher.
Chester: Hail risk derived from NOAA SPC historical reports.
Watertown: Hail risk derived from NOAA SPC historical reports.
Storm surge
Chester: Unavailable · Watertown: Unavailable
A score difference cannot be calculated without both sources.
Chester: Storm surge model is not available for this location yet.
Watertown: Storm surge model is not available for this location yet.
Wildfire
Chester: 39/100 · Watertown: 38/100
Chester is 1 points higher.
Chester: Wildfire exposure derived from ingested fire potential tiles.
Watertown: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Chester: 21/100 · Watertown: 21/100
No gap.
Chester: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Watertown: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.