Update: Twain Fire grows to 276 acres in Plumas County, now 10% contained

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Updated: 9:16 a.m. July 12

First discovered: 21 hours ago, 11:48 a.m. July 11

Initial location: North of Feather River Highway, Plumas County, Calif.

Fire unit: Plumas National Forest

Fire type: Wildfire

Fire name: Twain Fire

Twain Fire initially started 11:48 a.m. July 11 on North of Feather River Highway in Plumas County, California.

As of Sunday morning, 276 acres of land had been burnt by it, an increase of 151 acres since the last update. By Sunday morning, 10% of this fire was brought under containment. At present, details about the cause of the fire are unknown.

Fire containment

What does it mean for a fire to be 10% contained?

The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 10% of the wildfire is halted from spreading, while 90% 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 9:45 AM.