Lucas Valley-Marinwood, CA— fire, flood & earthquake hazard information
Lucas Valley-Marinwood is a unincorporated community in Marin County in the San Francisco Bay Area, covering about 5.7 square miles. This page summarizes what official government maps show for Lucas Valley-Marinwood: 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 Lucas Valley-Marinwood’s area that falls inside each mapped zone.
View Lucas Valley-Marinwood 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% of Lucas Valley-Marinwood is in a Very High fire hazard severity zone, 76% is in a Moderate zone. The remainder of its area is outside currently designated zones.
| Very High severity zone | less than 1% |
| Moderate severity zone | 76% |
FEMA flood zones
1% of Lucas Valley-Marinwood 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 Burdell Mountain fault, is about 4.9 mi (7.8 km) from the center of Lucas Valley-Marinwood.
| Nearest mapped fault | Burdell Mountain fault — 4.9 mi (7.8 km) |
Dam inundation, aircraft noise & air quality
annual average fine-particle (PM2.5) concentration across its census tracts is 8.1 μg/m³, and its composite pollution burden ranks around the 5th percentile statewide.
| Annual PM2.5 (tract average) | 8.1 μg/m³ |
| Pollution burden percentile (statewide) | ~5 |
Frequently asked questions
- Is Lucas Valley-Marinwood in a wildfire hazard severity zone?
- Per CAL FIRE's Fire Hazard Severity Zone maps, less than 1% of Lucas Valley-Marinwood is in a Very High fire hazard severity zone, 76% is in a Moderate zone. The remainder of its area is outside currently designated zones.
- Is Lucas Valley-Marinwood in a FEMA flood zone?
- 1% of Lucas Valley-Marinwood 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 Lucas Valley-Marinwood?
- The nearest mapped fault, the Burdell Mountain fault, is about 4.9 mi (7.8 km) from the center of Lucas Valley-Marinwood.
- How do I check a specific address in Lucas Valley-Marinwood?
- Use the free sitelume interactive map at https://sitelume.com — search any Lucas Valley-Marinwood address to see which mapped zones it falls in, layer by layer.
Nearby in Marin 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.