Crews Back-Burn Perimeter of Washburn Fire in Yosemite in Effort to Control Blaze

Firefighters used “intentional fire” to help create a control line to contain the Washburn fire burning in Yosemite National Park on Monday, July 11.

Video released by Yosemite Fire and Aviation shows a firefighter using “offensive firing” near the park’s south entrance on Monday, the organization said.

The Washburn fire spanned 2,340 acres and was zero percent contained as of Monday afternoon, Yosemite Fire and Aviation reported. More than 500 firefighters were working to control the blaze.

According to fire officials, firefighters are prioritizing the protection of the Mariposa Grove of giant sequoias. Credit: Yosemite Fire and Aviation via Storyful

Video transcript

- So it's all dependent on the situation and the conditions. And really, there's many tools and tactics that we utilize, and it's just picking the appropriate one for the right time. And offensive firing is one of those options that gets it down to a pre-established control line.

The crews will go up to the actual uncontrolled fire's edge, and they'll start working off of that uncontrolled edge bringing fire down the slope. Backfiring along the highway allows us to introduce low-intensity fire, bring it down the slopes to the control system, the road. It eliminates head fire crown fire, so it's low intensity backing where appropriate. Gets the fire down to our control line. Allows us to get in there, secure it, mop it up, extinguish it, remove the hazard trees, and be done much quicker.

So it's all dependent on the situation and the conditions. And really, there's many tools and tactics that we utilize, and it's just picking the appropriate one for the right time. And offensive firing is one of those options that gets it down to a pre-established control line.

The crews will go up to the actual uncontrolled fire's edge, and they'll start working off of that uncontrolled edge bringing fire down the slope. Backfiring along the highway allows us to introduce low-intensity fire, bring it down the slopes to the control system, the road. It eliminates head fire crown fire, so it's low intensity backing where appropriate. Gets the fire down to our control line. Allows us to get in there, secure it, mop it up, extinguish it, remove the hazard trees, and be done much

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