Rio Vista, CA— fire, flood & earthquake hazard information
Rio Vista is a city in Solano County in the San Francisco Bay Area, covering about 6.6 square miles. This page summarizes what official government maps show for Rio Vista: CAL FIRE fire hazard severity zones, FEMA flood zones, state seismic hazard zones, dam inundation areas, airport noise contours, and air-quality indicators. Figures are the share of Rio Vista’s area that falls inside each mapped zone.
View Rio Vista on the interactive map → to check any specific address, free.
Wildfire hazard severity zones
CAL FIRE's current Fire Hazard Severity Zone maps do not designate any zones within Rio Vista. Individual properties near the boundary can still fall inside a neighboring zone — check the exact address on the map.
FEMA flood zones
22% of Rio Vista lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO); less than 1% is in the 0.2% annual chance (500-year) area. Federally backed mortgages in a Special Flood Hazard Area generally require flood insurance.
| Special Flood Hazard Area (100-yr) | 22% |
| 0.2% annual chance (500-yr) | less than 1% |
Earthquake faults & seismic zones
The nearest mapped fault, the Rio Vista fault, is about 1.8 mi (2.8 km) from the center of Rio Vista.
| Nearest mapped fault | Rio Vista fault — 1.8 mi (2.8 km) |
Dam inundation, aircraft noise & air quality
7% of Rio Vista lies within a state-reviewed dam-failure inundation area; annual average fine-particle (PM2.5) concentration across its census tracts is 8.2 μg/m³, and its composite pollution burden ranks around the 74th percentile statewide.
| Dam-failure inundation area | 7% |
| Annual PM2.5 (tract average) | 8.2 μg/m³ |
| Pollution burden percentile (statewide) | ~74 |
Frequently asked questions
- Is Rio Vista in a wildfire hazard severity zone?
- CAL FIRE's current Fire Hazard Severity Zone maps do not designate any zones within Rio Vista. Individual properties near the boundary can still fall inside a neighboring zone — check the exact address on the map.
- Is Rio Vista in a FEMA flood zone?
- 22% of Rio Vista lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO); less than 1% is in the 0.2% annual chance (500-year) area. Federally backed mortgages in a Special Flood Hazard Area generally require flood insurance.
- What earthquake faults and seismic zones affect Rio Vista?
- The nearest mapped fault, the Rio Vista fault, is about 1.8 mi (2.8 km) from the center of Rio Vista.
- How do I check a specific address in Rio Vista?
- Use the free sitelume interactive map at https://sitelume.com — search any Rio Vista address to see which mapped zones it falls in, layer by layer.
Nearby in Solano County
Sources: CAL FIRE Fire Hazard Severity Zones; FEMA National Flood Hazard Layer; USGS Quaternary Faults; CGS Seismic Hazard Zones & Alquist-Priolo zones; Cal OES dam inundation maps; county ALUC noise contours; CalEnviroScreen 4.0. Area shares are computed against each place’s Census TIGER boundary (last computed 2026-07-24). Boundaries and zone designations change; always verify with the issuing agency.