Update: Acres burned in Lassen County grows to 565, Loomis Fire still 5% contained

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Updated: 10:19 a.m. July 12

First discovered: 21 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 Sunday morning, it had swept through 565 acres, an increase of 25 acres since the last update. As of Sunday morning, the fire crew managed to contain 5% 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 5% contained?

Containment indicates what percentage of the fire perimeter has been surrounded by a control line. In this case, it means that 5% of the wildfire is halted from spreading, while 95% 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 12, 2026 at 9:55 AM.