City vs city
Napa vs Sonoma, CA
Sonoma currently scores 7 points higher overall than Napa, 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
Napa: 29/100 · Sonoma: 36/100
Sonoma is 7 points higher.
Flood
Napa: 43/100 · Sonoma: 47/100
Sonoma is 4 points higher.
Napa: FEMA NFHL flood zones: 13 features intersect this tile.
Sonoma: FEMA NFHL flood zones: 12 features intersect this tile.
Wind
Napa: 2/100 · Sonoma: 2/100
No gap.
Napa: Wind exposure derived from ingested design wind / climatology tiles.
Sonoma: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Napa: 0/100 · Sonoma: 0/100
No gap.
Napa: Lightning exposure derived from ingested climatology tiles.
Sonoma: Lightning exposure derived from ingested climatology tiles.
Tornado
Napa: 0/100 · Sonoma: 0/100
No gap.
Napa: Tornado risk derived from NOAA SPC historical reports.
Sonoma: Tornado risk derived from NOAA SPC historical reports.
Hail
Napa: 3/100 · Sonoma: 0/100
Napa is 3 points higher.
Napa: Hail risk derived from NOAA SPC historical reports.
Sonoma: Hail risk derived from NOAA SPC historical reports.
Storm surge
Napa: Unavailable · Sonoma: Unavailable
A score difference cannot be calculated without both sources.
Napa: Storm surge model is not available for this location yet.
Sonoma: Storm surge model is not available for this location yet.
Wildfire
Napa: 71/100 · Sonoma: 69/100
Napa is 2 points higher.
Napa: Wildfire exposure derived from ingested fire potential tiles.
Sonoma: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Napa: 26/100 · Sonoma: 26/100
No gap.
Napa: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Sonoma: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.