Fire crews battling California’s biggest wildfire have increased containment of the Plaskett Fire in Monterey County to 23%, officials said Friday.

The Big Sur blaze stood at 29,768 acres, up slightly from 29,476 on Thursday, when containment was 19%.

The state’s second-largest conflagration, the Timber Fire, also in Big Sur, remained at 25,346 acres and 23% containment on Friday, Cal Fire said.

A helicopter crew prepares for wildfire suppression operations on the Los Padres National Forest in an undated video released by the U.S. Forest Service. Helicopters are critical resource in the suppression the Timber and Plaskett fires by transporting firefighters and equipment and supporting water-dropping missions. (U.S. Forest Service via Bay City News)

A portion of state Highway 1 was closed from mile marker 19 at the Kirk Creek Campground to mile marker 0.0 at the Monterey/San Luis Obispo County line, Cal Fire said.

More than 2,000 personnel were committed to the Plaskett Fire, which was first reported on Aug. 26, in the Los Padres National Forest. No injuries or structural losses have been reported.

One firefighter has been injured in the Timber Fire, which has been burning since Aug. 8 and has 1,348 personnel assigned.