City vs city
Fremont vs Union City, CA
Fremont and Union City are tied on overall score, with the biggest factor difference in wildfire.
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
Fremont: 23/100 · Union City: 23/100
No gap.
Flood
Fremont: 31/100 · Union City: 30/100
Fremont is 1 points higher.
Fremont: FEMA NFHL flood zones: 13 features intersect this tile.
Union City: FEMA NFHL flood zones: 7 features intersect this tile.
Wind
Fremont: 2/100 · Union City: 2/100
No gap.
Fremont: Wind exposure derived from ingested design wind / climatology tiles.
Union City: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Fremont: 0/100 · Union City: 0/100
No gap.
Fremont: Lightning exposure derived from ingested climatology tiles.
Union City: Lightning exposure derived from ingested climatology tiles.
Tornado
Fremont: 0/100 · Union City: 0/100
No gap.
Fremont: Tornado risk derived from NOAA SPC historical reports.
Union City: Tornado risk derived from NOAA SPC historical reports.
Hail
Fremont: 4/100 · Union City: 1/100
Fremont is 3 points higher.
Fremont: Hail risk derived from NOAA SPC historical reports.
Union City: Hail risk derived from NOAA SPC historical reports.
Storm surge
Fremont: Unavailable · Union City: Unavailable
A score difference cannot be calculated without both sources.
Fremont: Storm surge model is not available for this location yet.
Union City: Storm surge model is not available for this location yet.
Wildfire
Fremont: 54/100 · Union City: 58/100
Union City is 4 points higher.
Fremont: Wildfire exposure derived from ingested fire potential tiles.
Union City: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Fremont: 24/100 · Union City: 24/100
No gap.
Fremont: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Union City: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.