City vs city
Costa Mesa vs Fountain Valley, CA
Costa Mesa currently scores 1 points higher overall than Fountain Valley, with the largest gap in tornado.
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
Costa Mesa: 31/100 · Fountain Valley: 30/100
Costa Mesa is 1 points higher.
Flood
Costa Mesa: 33/100 · Fountain Valley: 62/100
Fountain Valley is 29 points higher.
Costa Mesa: FEMA NFHL flood zones: 15 features intersect this tile.
Fountain Valley: FEMA NFHL flood zones: 8 features intersect this tile.
Wind
Costa Mesa: 5/100 · Fountain Valley: 5/100
No gap.
Costa Mesa: Wind exposure derived from ingested design wind / climatology tiles.
Fountain Valley: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Costa Mesa: 0/100 · Fountain Valley: 0/100
No gap.
Costa Mesa: Lightning exposure derived from ingested climatology tiles.
Fountain Valley: Lightning exposure derived from ingested climatology tiles.
Tornado
Costa Mesa: 54/100 · Fountain Valley: 12/100
Costa Mesa is 42 points higher.
Costa Mesa: Tornado risk derived from NOAA SPC historical reports.
Fountain Valley: Tornado risk derived from NOAA SPC historical reports.
Hail
Costa Mesa: 8/100 · Fountain Valley: 2/100
Costa Mesa is 6 points higher.
Costa Mesa: Hail risk derived from NOAA SPC historical reports.
Fountain Valley: Hail risk derived from NOAA SPC historical reports.
Storm surge
Costa Mesa: Unavailable · Fountain Valley: Unavailable
A score difference cannot be calculated without both sources.
Costa Mesa: Storm surge model is not available for this location yet.
Fountain Valley: Storm surge model is not available for this location yet.
Wildfire
Costa Mesa: 59/100 · Fountain Valley: 67/100
Fountain Valley is 8 points higher.
Costa Mesa: Wildfire exposure derived from ingested fire potential tiles.
Fountain Valley: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Costa Mesa: 28/100 · Fountain Valley: 31/100
Fountain Valley is 3 points higher.
Costa Mesa: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Fountain Valley: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.