Update: Containment of Pine Fire in San Bernardino County grows to 50%

The creation of this content included the use of AI based on templates created, reviewed and edited by journalists in the newsroom. Read more on our AI policy here.

Updated: 7:07 a.m. July 17

First discovered: 24 hours ago, 6:25 a.m. July 16

Initial location: Near Pine Avenue and Corona Freeway, Chino Hills, San Bernardino County, Calif.

Fire unit: Unified Command: Chino Valley Fire District & Cal Fire San Bernardino Unit

Fire type: Wildfire

Fire name: Pine Fire

Pine Fire initially started 6:25 a.m. July 16 at Near Pine Avenue and Corona Freeway, Chino Hills in San Bernardino County, California.

As of Friday morning, 20 acres of land had been consumed by it. By Friday morning, the fire crew effectively contained 50% of this wildfire. At present, details about the cause of the fire are unknown.

Fire containment

This is what 50% containment means

The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 50% of the wildfire is halted from spreading, while 50% 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 July 17, 2026 at 7:24 AM.