East Foothills, CA— fire, flood & earthquake hazard information
East Foothills is a unincorporated community in Santa Clara County in the San Francisco Bay Area, covering about 2.1 square miles. This page summarizes what official government maps show for East Foothills: 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 East Foothills’s area that falls inside each mapped zone.
View East Foothills on the interactive map → to check any specific address, free.
Wildfire hazard severity zones
Per CAL FIRE's Fire Hazard Severity Zone maps, less than 1% is in a High zone. The remainder of its area is outside currently designated zones.
| High severity zone | less than 1% |
FEMA flood zones
FEMA's National Flood Hazard Layer does not map any Special Flood Hazard Areas within East Foothills. Unmapped does not mean flooding cannot occur — it means no zone is currently designated.
Earthquake faults & seismic zones
The nearest mapped fault, the Hayward fault zone, is about 0.3 mi (0.5 km) from the center of East Foothills. 1 named fault trace 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. 49% is in an earthquake-induced landslide zone. 13% falls within an Alquist-Priolo earthquake fault zone, where new construction requires a fault study.
| Nearest mapped fault | Hayward fault zone — 0.3 mi (0.5 km) |
| Named fault traces crossing boundary | 1 |
| Liquefaction zone | less than 1% |
| Earthquake-induced landslide zone | 49% |
| Alquist-Priolo fault zone | 13% |
Dam inundation, aircraft noise & air quality
2% of East Foothills 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 2th percentile statewide.
| Dam-failure inundation area | 2% |
| Annual PM2.5 (tract average) | 8.2 μg/m³ |
| Pollution burden percentile (statewide) | ~2 |
Frequently asked questions
- Is East Foothills in a wildfire hazard severity zone?
- Per CAL FIRE's Fire Hazard Severity Zone maps, less than 1% is in a High zone. The remainder of its area is outside currently designated zones.
- Is East Foothills in a FEMA flood zone?
- FEMA's National Flood Hazard Layer does not map any Special Flood Hazard Areas within East Foothills. Unmapped does not mean flooding cannot occur — it means no zone is currently designated.
- What earthquake faults and seismic zones affect East Foothills?
- The nearest mapped fault, the Hayward fault zone, is about 0.3 mi (0.5 km) from the center of East Foothills. 1 named fault trace 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. 49% is in an earthquake-induced landslide zone. 13% falls within an Alquist-Priolo earthquake fault zone, where new construction requires a fault study.
- How do I check a specific address in East Foothills?
- Use the free sitelume interactive map at https://sitelume.com — search any East Foothills 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.