Lexington Hills, CA— fire, flood & earthquake hazard information
Lexington Hills is a unincorporated community in Santa Clara County in the San Francisco Bay Area, covering about 4.7 square miles. This page summarizes what official government maps show for Lexington Hills: 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 Lexington Hills’s area that falls inside each mapped zone.
View Lexington Hills on the interactive map → to check any specific address, free.
Wildfire hazard severity zones
Per CAL FIRE's Fire Hazard Severity Zone maps, 52% of Lexington Hills is in a Very High fire hazard severity zone, 47% is in a High zone, 1% is in a Moderate zone. The remainder of its area is outside currently designated zones.
| Very High severity zone | 52% |
| High severity zone | 47% |
| Moderate severity zone | 1% |
FEMA flood zones
1% of Lexington Hills lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO). Federally backed mortgages in a Special Flood Hazard Area generally require flood insurance.
| Special Flood Hazard Area (100-yr) | 1% |
Earthquake faults & seismic zones
The nearest mapped fault, the San Andreas fault zone, is about 0.2 mi (0.2 km) from the center of Lexington Hills. 2 named fault traces in the USGS Quaternary fault database cross its boundary. less than 1% of its area is in a state-designated liquefaction zone of required investigation. 81% is in an earthquake-induced landslide zone. 21% falls within an Alquist-Priolo earthquake fault zone, where new construction requires a fault study.
| Nearest mapped fault | San Andreas fault zone — 0.2 mi (0.2 km) |
| Named fault traces crossing boundary | 2 |
| Liquefaction zone | less than 1% |
| Earthquake-induced landslide zone | 81% |
| Alquist-Priolo fault zone | 21% |
Dam inundation, aircraft noise & air quality
4% of Lexington Hills lies within a state-reviewed dam-failure inundation area; annual average fine-particle (PM2.5) concentration across its census tracts is 6.8 μg/m³, and its composite pollution burden ranks around the 37th percentile statewide.
| Dam-failure inundation area | 4% |
| Annual PM2.5 (tract average) | 6.8 μg/m³ |
| Pollution burden percentile (statewide) | ~37 |
Frequently asked questions
- Is Lexington Hills in a wildfire hazard severity zone?
- Per CAL FIRE's Fire Hazard Severity Zone maps, 52% of Lexington Hills is in a Very High fire hazard severity zone, 47% is in a High zone, 1% is in a Moderate zone. The remainder of its area is outside currently designated zones.
- Is Lexington Hills in a FEMA flood zone?
- 1% of Lexington Hills lies within a FEMA Special Flood Hazard Area (1% annual chance, zones A/AE/AH/AO). Federally backed mortgages in a Special Flood Hazard Area generally require flood insurance.
- What earthquake faults and seismic zones affect Lexington Hills?
- The nearest mapped fault, the San Andreas fault zone, is about 0.2 mi (0.2 km) from the center of Lexington Hills. 2 named fault traces in the USGS Quaternary fault database cross its boundary. less than 1% of its area is in a state-designated liquefaction zone of required investigation. 81% is in an earthquake-induced landslide zone. 21% falls within an Alquist-Priolo earthquake fault zone, where new construction requires a fault study.
- How do I check a specific address in Lexington Hills?
- Use the free sitelume interactive map at https://sitelume.com — search any Lexington Hills address to see which mapped zones it falls in, layer by layer.
Nearby in Santa Clara 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.