City vs city
Johnson Siding vs Piedmont, SD
Johnson Siding currently scores 4 points higher overall than Piedmont, 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 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
Johnson Siding: 47/100 · Piedmont: 43/100
Johnson Siding is 4 points higher.
Flood
Johnson Siding: 44/100 · Piedmont: 59/100
Piedmont is 15 points higher.
Johnson Siding: FEMA NFHL flood zones: 2 features intersect this tile.
Piedmont: FEMA NFHL flood zones: 4 features intersect this tile.
Wind
Johnson Siding: 19/100 · Piedmont: 20/100
Piedmont is 1 points higher.
Johnson Siding: Wind exposure derived from ingested design wind / climatology tiles.
Piedmont: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Johnson Siding: 23/100 · Piedmont: 25/100
Piedmont is 2 points higher.
Johnson Siding: Lightning exposure derived from ingested climatology tiles.
Piedmont: Lightning exposure derived from ingested climatology tiles.
Tornado
Johnson Siding: 0/100 · Piedmont: 8/100
Piedmont is 8 points higher.
Johnson Siding: Tornado risk derived from NOAA SPC historical reports.
Piedmont: Tornado risk derived from NOAA SPC historical reports.
Hail
Johnson Siding: 100/100 · Piedmont: 100/100
No gap.
Johnson Siding: Hail risk derived from NOAA SPC historical reports.
Piedmont: Hail risk derived from NOAA SPC historical reports.
Storm surge
Johnson Siding: Unavailable · Piedmont: Unavailable
A score difference cannot be calculated without both sources.
Johnson Siding: Storm surge model is not available for this location yet.
Piedmont: Storm surge model is not available for this location yet.
Wildfire
Johnson Siding: 69/100 · Piedmont: 60/100
Johnson Siding is 9 points higher.
Johnson Siding: Wildfire exposure derived from ingested fire potential tiles.
Piedmont: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Johnson Siding: 27/100 · Piedmont: 27/100
No gap.
Johnson Siding: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Piedmont: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.