Lucas

active fire wildfire

Updated

ACRES BURNED

1,099

STATE

California

ORIGIN COUNTY
Lake, Mendocino
CONTAINMENT

5%

Environment
Right Now
Fair icon
68°F
Fair
Gentle Wind 8 mph · NW
31
Good Air Quality
TODAY SEP 12 SEP 13 SEP 14
Weather Fair 68° 61° Fog 61° 41° Fair 73° 37° Overcast 81° 45°
Area Fire Potential
TODAY Moderate
SEP 12 Moderate
SEP 13 Low
SEP 14 Low
Area Fuels
No Data
Nearby Structures
WITHIN
1
Other
Known Structures
1 structures
WITHIN
Response
LEAD AGENCY
CAL FIRE
Details
Undetermined According to NIFC, the cause is still undetermined
INCIDENT DETAILS
DESCRIPTION
Near the Lake County and Mendocino County line, Potter Valley
OVERVIEW
Lucas Fire started on 09/10 and is currently at 1,099 acres and 5% containment.
From the Web
External data is not official This information is compiled automatically, and is not confirmed by a human reviewer. September 11, 2026 at 12:55 AM PDT

Lucas Fire Report — September 11, 2026

Evacuation orders active in Lake County as fire threatens Bachelor Valley

The Lucas Fire is burning in steep, remote terrain northeast of Highway 20 near the Lake and Mendocino county line, spreading toward Bachelor Valley and Elk Mountain Road. Driven by dry fuels and long-range spotting, the blaze advanced downhill and backed through brush and timber. Firefighters are actively defending structures in Bachelor Valley as Lake County emergency officials monitor threats to nearby communities.

Evacuations and Closures

  • Evacuation orders in Lake County (September 10): Mandatory evacuations are in effect for zones MNF-E016, MNF-E018, MNF-E019, UPP-E023, UPP-E025, UPP-E026, UPP-E027, and UPP-E030.
  • Evacuation warnings in Lake County (September 10): Warnings are in effect for zones MNF-E017, MNF-E021, UPP-E028, UPP-E031, UPP-E032, UPP-E035, and UPP-E038.
  • Evacuation warnings in Mendocino County (September 10): Warnings are in effect for zones MEN-2POT08 and MEN-2UKV28 in the Potter Valley area.
  • Shelters (September 10): A temporary evacuation point and livestock shelter is open at the Lake County Fairgrounds Baldwin Pavilion in Lakeport, with livestock entry via the Estep Drive gate.
  • School closures (September 11): Upper Lake Unified School District has closed all schools for Friday, September 11.
  • Utility outages (September 10): Electrical power is shut off along Elk Mountain Road between White Rock Road and Middle Creek.

Impact

No injuries or fatalities have been reported as of September 10, 2026. Power has been turned off along Elk Mountain Road between White Rock Road and Middle Creek, and structure defense operations are active in Bachelor Valley.

Conditions and Outlook

Northwest winds are expected to remain gusty through Saturday before easing substantially into Sunday. Cooler air and higher humidity over the weekend will give way to warmer, drier weather early next week, with dry conditions persisting throughout. Firefighters plan to continue direct structure protection and line construction while watching for spotting in receptive fuels.

Cause and Context

The cause remains under investigation as of September 10, 2026. The fire is burning through grass, oak woodland, and brush within the footprint of the 2018 Ranch Fire scar.

Official updates current through September 11, 2026.

CITATIONS
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