City vs city
Coleharbor vs Riverdale, ND
Coleharbor currently scores 14 points higher overall than Riverdale, 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
Coleharbor: 39/100 · Riverdale: 25/100
Coleharbor is 14 points higher.
Flood
Coleharbor: 75/100 · Riverdale: 39/100
Coleharbor is 36 points higher.
Coleharbor: FEMA NFHL flood zones: 5 features intersect this tile.
Riverdale: FEMA NFHL flood zones: 2 features intersect this tile.
Wind
Coleharbor: 18/100 · Riverdale: 18/100
No gap.
Coleharbor: Wind exposure derived from ingested design wind / climatology tiles.
Riverdale: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Coleharbor: 25/100 · Riverdale: 26/100
Riverdale is 1 points higher.
Coleharbor: Lightning exposure derived from ingested climatology tiles.
Riverdale: Lightning exposure derived from ingested climatology tiles.
Tornado
Coleharbor: 0/100 · Riverdale: 4/100
Riverdale is 4 points higher.
Coleharbor: Tornado risk derived from NOAA SPC historical reports.
Riverdale: Tornado risk derived from NOAA SPC historical reports.
Hail
Coleharbor: 44/100 · Riverdale: 19/100
Coleharbor is 25 points higher.
Coleharbor: Hail risk derived from NOAA SPC historical reports.
Riverdale: Hail risk derived from NOAA SPC historical reports.
Storm surge
Coleharbor: Unavailable · Riverdale: Unavailable
A score difference cannot be calculated without both sources.
Coleharbor: Storm surge model is not available for this location yet.
Riverdale: Storm surge model is not available for this location yet.
Wildfire
Coleharbor: 31/100 · Riverdale: 30/100
Coleharbor is 1 points higher.
Coleharbor: Wildfire exposure derived from ingested fire potential tiles.
Riverdale: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Coleharbor: 39/100 · Riverdale: 38/100
Coleharbor is 1 points higher.
Coleharbor: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Riverdale: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.