Update: Telephone Fire in San Bernardino County hits full containment by noon Sunday

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Updated: 12:30 p.m. June 14

First discovered: 23 hours ago, 1:02 p.m. June 13

Initial location: Telephone Rd and Summit Valley Rd, Hesperia, San Bernardino County, Calif.

Fire unit: San Bernadino County Fire

Fire type: Wildfire

Fire name: Telephone

Telephone Fire initially started 1:02 p.m. June 13 at Telephone Rd and Summit Valley Rd, Hesperia in San Bernardino County, California.

It has burned 14.7 acres after being active for 23 hours. As of Sunday noon, a fire crew of 140 has achieved full containment of the blaze. The cause of it remains under investigation.

The fire suppression efforts involved 12 engines, two water tenders, two helicopters, two dozers and four hand crews. According to Cal Fire, "Numerous firefighting air tankers from throughout the State are flying fire suppression missions as conditions allow."

Fire containment

What does 100% containment mean?

Note that full containment doesn't mean the fire is completely out. In this case, it means that the wildfire has been fully enclosed by a control line and it is now stopped from spreading. A fully contained wildfire may continue to burn within the containment perimeter but is not likely to spread.

However, there's a significant difference between containing and controlling a wildfire. After the fire is fully contained, the next step is to control it. Controlling a fire means ensuring that the fire can't spread or cross the containment line.

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 14, 2026 at 11:55 AM.