Update: Loomis Fire in Lassen County - 15% containment reached

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Updated: 9:04 a.m. July 13

First discovered: 44 hours ago, 12:47 p.m. July 11

Initial location: Dixie Valley, Lassen County, Calif.

Fire unit: Cal Fire Lassen-Modoc Unit

Fire type: Wildfire

Fire name: Loomis Fire

Loomis Fire initially started 12:47 p.m. July 11 in Dixie Valley in Lassen County, California.

By Monday morning, it had swept through 656 acres. As of Monday morning, the fire crew managed to contain 15% of the wildfire. There is currently no information on the cause of the fire.

Fire containment

What does it mean for a fire to be 15% contained?

Containment indicates what percentage of the fire perimeter has been surrounded by a control line. In this case, it means that 15% of the wildfire is halted from spreading, while 85% 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 July 13, 2026 at 8:29 AM.