City vs city
Bismarck vs Napoleon, ND
Bismarck currently scores 8 points higher overall than Napoleon, 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
Bismarck: 38/100 · Napoleon: 30/100
Bismarck is 8 points higher.
Flood
Bismarck: 44/100 · Napoleon: 8/100
Bismarck is 36 points higher.
Bismarck: FEMA NFHL flood zones: 5 features intersect this tile.
Napoleon: FEMA NFHL flood zones: 1 features intersect this tile.
Wind
Bismarck: 19/100 · Napoleon: 20/100
Napoleon is 1 points higher.
Bismarck: Wind exposure derived from ingested design wind / climatology tiles.
Napoleon: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Bismarck: 31/100 · Napoleon: 24/100
Bismarck is 7 points higher.
Bismarck: Lightning exposure derived from ingested climatology tiles.
Napoleon: Lightning exposure derived from ingested climatology tiles.
Tornado
Bismarck: 8/100 · Napoleon: 23/100
Napoleon is 15 points higher.
Bismarck: Tornado risk derived from NOAA SPC historical reports.
Napoleon: Tornado risk derived from NOAA SPC historical reports.
Hail
Bismarck: 100/100 · Napoleon: 100/100
No gap.
Bismarck: Hail risk derived from NOAA SPC historical reports.
Napoleon: Hail risk derived from NOAA SPC historical reports.
Storm surge
Bismarck: Unavailable · Napoleon: Unavailable
A score difference cannot be calculated without both sources.
Bismarck: Storm surge model is not available for this location yet.
Napoleon: Storm surge model is not available for this location yet.
Wildfire
Bismarck: 35/100 · Napoleon: 24/100
Bismarck is 11 points higher.
Bismarck: Wildfire exposure derived from ingested fire potential tiles.
Napoleon: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Bismarck: 31/100 · Napoleon: 14/100
Bismarck is 17 points higher.
Bismarck: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Napoleon: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.