City vs city
Boulder vs Thornton, CO
Thornton currently scores 3 points higher overall than Boulder, with the largest gap in lightning.
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
Boulder: 45/100 · Thornton: 48/100
Thornton is 3 points higher.
Flood
Boulder: 50/100 · Thornton: 54/100
Thornton is 4 points higher.
Boulder: FEMA NFHL flood zones: 21 features intersect this tile.
Thornton: FEMA NFHL flood zones: 13 features intersect this tile.
Wind
Boulder: 15/100 · Thornton: 15/100
No gap.
Boulder: Wind exposure derived from ingested design wind / climatology tiles.
Thornton: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Boulder: 23/100 · Thornton: 32/100
Thornton is 9 points higher.
Boulder: Lightning exposure derived from ingested climatology tiles.
Thornton: Lightning exposure derived from ingested climatology tiles.
Tornado
Boulder: 23/100 · Thornton: 27/100
Thornton is 4 points higher.
Boulder: Tornado risk derived from NOAA SPC historical reports.
Thornton: Tornado risk derived from NOAA SPC historical reports.
Hail
Boulder: 100/100 · Thornton: 100/100
No gap.
Boulder: Hail risk derived from NOAA SPC historical reports.
Thornton: Hail risk derived from NOAA SPC historical reports.
Storm surge
Boulder: Unavailable · Thornton: Unavailable
A score difference cannot be calculated without both sources.
Boulder: Storm surge model is not available for this location yet.
Thornton: Storm surge model is not available for this location yet.
Wildfire
Boulder: 74/100 · Thornton: 75/100
Thornton is 1 points higher.
Boulder: Wildfire exposure derived from ingested fire potential tiles.
Thornton: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Boulder: 28/100 · Thornton: 31/100
Thornton is 3 points higher.
Boulder: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Thornton: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.