Lucas Fire

Perimeter mapped September 16, 2026 at 10:37 AM PDT, 3,922 acres (mixed methods). Point of origin 39.232, -123.003.

Live radar at the fire Forecast for Upper Lake

Size

4,128 acres

Containment

95%

Discovered

September 10, 2026 at 2:21 PM PDT

Cause

Undetermined

Location

10 Miles N from Upper Lake, CA

County

Lake County

State

California

Nearest city reported

Upper Lake

Protecting agency

CAL FIRE

Land ownership at origin

Private

Personnel assigned

209

Incident management

Type 3 IC, Type 3 Incident

Primary fuel

Tall Grass (2.5 feet)

Estimated cost to date

$27,302,767

Incident type

Wildfire

Unique fire identifier

2026-CALNU-016127

IRWIN identifier

0330E46B-236E-4706-8A32-04AC4A27AC1F

Mapped area at the last perimeter of each day, from September 13, 2026 (0 acres) to September 16, 2026 (3,922 acres). The largest one-day growth was 3,922 acres, mapped September 16, 2026.

• Wind up to 6 mph from the west
• Relative humidity as low as 26%
• High of 81°F

National Weather Service hourly forecast for the fire’s point of origin, next 24 hours.

Full forecast for Upper Lake, CA

Red Flag Warnings and Fire Weather Watches covering the fire's point of origin.

No Red Flag Warning or Fire Weather Watch is in force at the fire.

NOAA’s Hazard Mapping System analysts have not drawn smoke over the fire’s origin today.

NOAA’s smoke model forecasts near-surface smoke at the origin peaking at 1.8 µg/m³ around Mon, 2:00 AM PDT over the next 48 hours.

Smoke and fire layers on the radar

• Upper Lake, CA7 miles southeast of the fire’s origin
• Redwood Valley, CA11 miles west of the fire’s origin
• Talmage, CA11 miles southwest of the fire’s origin
• Nice, CA11 miles southeast of the fire’s origin
• North Lakeport, CA11 miles southeast of the fire’s origin
• Ukiah, CA12 miles southwest of the fire’s origin