Update: Head Fire in Napa County still at 50% containment as of Tuesday morning

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Updated: 5:30 a.m. June 30

First discovered: 23 hours ago, 6:26 a.m. June 29

Initial location: Berryessa Knoxville Road and Knoxville Devilhead Road, near Napa and Lake County borders, Calif.

Fire unit: Cal Fire Sonoma-Lake-Napa Unit

Fire type: Wildfire

Fire name: Head Fire

Head Fire initially started 6:26 a.m. June 29 at Berryessa Knoxville Road and Knoxville Devilhead Road, near Napa and Lake County borders in Napa County, California.

After being active for 23 hours, it has burned 98 acres. A fire crew of 85 has been working on site and, by Tuesday morning, they managed to contain 50% of the fire. However, investigations into the cause are ongoing.

The fire is fought by five engines, four water tenders and four hand crews. According to Cal Fire, "Numerous firefighting air tankers from throughout the State are flying fire suppression missions as conditions allow."

See live video from the area:

Https://cameras.alertcalifornia.org/?id=Axis-CobbMtn2

Fire containment

What does it mean for a fire to be 50% contained?

The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 50% of the wildfire is contained from spreading, while 50% is still uncontrolled.

Containment is part of a larger plan for managing a wildfire. It is normally expressed as a percentage and it refers to how much of the fire perimeter has been surrounded/enclosed by a control line that firefighters create. The containment percentage indicates a certain level of control, but it doesn't always correlate to safety level. Also, it's important to note that containment doesn't mean a fire is out.

How is containment measured?

The incident's central command constantly receives progress reports from firefighters on the ground. As the fireline is constructed, inspected or reinforced, mappers record those details to adjust the containment percentage. The percentage tells the public how much of the fire perimeter is believed to not go beyond the control lines.

Source: Cal Fire

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This story was originally published June 30, 2026 at 5:52 AM.