Update: Rock Fire in Los Angeles County grows to 80% containment

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Updated: 6:11 a.m. June 16

First discovered: 17 hours ago, 12:23 p.m. June 15

Initial location: 190th ST cross of West of Ave. C, Los Angeles County, Calif.

Fire unit: LA County Fire Department

Fire type: Wildfire

Fire name: Rock Fire

Rock Fire initially started 12:23 p.m. June 15 at 190th ST cross of West of Ave. C in Los Angeles County, California.

After being active for 17 hours, it has burned 95 acres. By Tuesday morning, the fire crew effectively contained 80% of the wildfire. The cause of it is still under investigation.

See live video from the area:

Https://cameras.alertcalifornia.org/?id=Axis-PortalRidge1

Fire containment

What does it mean for a fire to be 80% contained?

The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 80% of the wildfire is contained from spreading, while 20% 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

United Robots Sacramento

This story was originally published June 16, 2026 at 6:22 AM.