This is not a Natural Hazard Disclosure statement. Open state data, explained; flood and dam zones are not covered. Details
Fire hazard severity zones in Alameda County
63.0% of Alameda County is mapped in a fire hazard severity zone, and 52.5% in High or Very High, where the seller disclosures apply.
Very High zone24.7% of the area
High zone27.8%
Moderate zone10.5%
Earthquake fault zone3.2%
Liquefaction zone25.5%
Landslide zone12.7%
Not evaluated for seismic hazards33.9%: a zero above proves nothing there
Fires recorded since 195088
Land area750.3 sq mi
Median home value (2019-2023)$1,057,400
Flood and dam zonesnot covered
Cities and places in Alameda County
- Alameda (0%)
- Albany (0%)
- Ashland (0%)
- Berkeley (9%)
- Castro Valley (48%)
- Cherryland (0%)
- Dublin (20%)
- Emeryville (0%)
- Fairview (18%)
- Fremont (6%)
- Hayward (17%)
- Livermore (5%)
- Newark (0%)
- Oakland (12%)
- Piedmont (0%)
- Pleasanton (24%)
- San Leandro (2%)
- San Lorenzo (0%)
- Sunol (54%)
- Union City (49%)
Percent of the area in High or Very High zones.
Fires recorded in or across Alameda County
The state record shows 88 since 1950. The largest was SCU LIGHTNING COMPLEX in 2020 (396,824 acres in total).
- WARM (2025), 1 acres
- MAYHEWS (2025), 1 acres
- MIDWAY (2025), 261 acres
- CREEK (2024), 744 acres
- FLYNN (2024), 429 acres
- PATTERSON (2024), 96 acres
- PEAK (2024), 0 acres
- TESLA (2022), 552 acres
- BRUNS (2022), 12 acres
- EDEN (2022), 58 acres
- CANYON (2022), 50 acres
- FLYNN (2022), 174 acres
- PASS (2022), 65 acres
- MIDWAY (2022), 14 acres
- SCU LIGHTNING COMPLEX (2020), 396,824 acres