City vs city
Rolla vs Shell Valley, ND
Shell Valley currently scores 6 points higher overall than Rolla, with the largest gap in ingested air quality.
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
Rolla: 23/100 · Shell Valley: 29/100
Shell Valley is 6 points higher.
Flood
Rolla: 36/100 · Shell Valley: 36/100
No gap.
Rolla: FEMA NFHL flood zones: 1 features intersect this tile.
Shell Valley: FEMA NFHL flood zones: 1 features intersect this tile.
Wind
Rolla: 18/100 · Shell Valley: 18/100
No gap.
Rolla: Wind exposure derived from ingested design wind / climatology tiles.
Shell Valley: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Rolla: 7/100 · Shell Valley: 6/100
Rolla is 1 points higher.
Rolla: Lightning exposure derived from ingested climatology tiles.
Shell Valley: Lightning exposure derived from ingested climatology tiles.
Tornado
Rolla: 8/100 · Shell Valley: 0/100
Rolla is 8 points higher.
Rolla: Tornado risk derived from NOAA SPC historical reports.
Shell Valley: Tornado risk derived from NOAA SPC historical reports.
Hail
Rolla: 20/100 · Shell Valley: 6/100
Rolla is 14 points higher.
Rolla: Hail risk derived from NOAA SPC historical reports.
Shell Valley: Hail risk derived from NOAA SPC historical reports.
Storm surge
Rolla: Unavailable · Shell Valley: Unavailable
A score difference cannot be calculated without both sources.
Rolla: Storm surge model is not available for this location yet.
Shell Valley: Storm surge model is not available for this location yet.
Wildfire
Rolla: 59/100 · Shell Valley: 72/100
Shell Valley is 13 points higher.
Rolla: Wildfire exposure derived from ingested fire potential tiles.
Shell Valley: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Rolla: 13/100 · Shell Valley: 38/100
Shell Valley is 25 points higher.
Rolla: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Shell Valley: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.