Update: Hog Fire grows to 200 acres in Fresno County, containment now at 40%

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Updated: 6:47 a.m. April 23

First discovered: Less than an hour ago, 6:43 a.m. April 23

Initial location: Trimmer Springs Road & Lakeview, Trimmer, Fresno County, Calif.

Fire unit: Sierra National Forest

Fire type: Wildfire

Fire name: Hog Fire

Hog Fire initially started today at 6:43 a.m. at Trimmer Springs Road & Lakeview, Trimmer in Fresno County, California.

It has burned 200 acres after being active for less than an hour. As of Thursday morning, 40% of this fire was brought under containment. The cause of it is still under investigation.

Fire containment

What does it mean for a fire to be 40% contained?

The percentage indicates how much of the fire perimeter has been surrounded by a control line. In this case, it means that 40% of the wildfire is contained from spreading, while 60% 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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