Two firefighters injured as Ferguson fire near Yosemite National Parkgrows to 21,000 acres

Just days after the death of a Cal Fire bulldozer operator, two more firefighters were injured while battling the Ferguson fire near Yosemite National Park, officials said.

One firefighter broke a leg and was being treated in a hospital, and the other suffered heat-related injuries, authorities said Thursday. Michael Whitaker, a spokesman for the California Department of Forestry and Fire Protection, said he did not know where the firefighters were injured or what agencies they belonged to.

Whitaker said 2,100 personnel are working to contain the blaze, which has burned through 21,041 acres of rugged, often inaccessible terrain that is full of dead trees, brush and pine needles. The detritus has served as a tinderbox for the fast-moving fire, which was 7% contained as of Thursday morning, a slight improvement from the night before.

Whitaker said 166 fire engines, 21 water tenders, 18 helicopters, 55 hand crews, 29 bulldozers and numerous air tankers were involved in battling the blaze. Aircraft are having a hard time dropping water because the smoke has been clinging low to the ground, reducing visibility.

Cal Fire heavy equipment operator Braden Varney died when his bulldozer tumbled down a steep canyon as he was cutting away vegetation to protect the community of Jerseydale. He was found dead on July 14.

The monsoonal moisture and thunderstorms that officials were preparing for Wednesday did not materialize, but the chances of thunderstorms are higher Thursday afternoon and Friday, according to fire officials.

While rain could help tame the fire, thunderstorms also pose a risk to firefighters trying to navigate already-difficult terrain, and they bring lighting that could ignite new fires as well as erratic winds, Whitaker said.

“When that happens our fire can actually change any direction ... 360 degrees,” he said.

No structures have been damaged as the fire rages through terrain that in some areas has not seen fire since the 1920s. Mandatory evacuation orders are still in place for the Jerseydale and Mariposa Pines communities, Cedar Lodge and Indian Flat Campground, Savage's Trading Post and Sweetwater Ridge.

Crews are working to prevent the fire, which is mainly growing to the southeast, from crossing Highway 140 to the north and threatening Yosemite National Park to the east and residential communities to the south, Whitaker said.

Where crews are unable to fight the fire directly or build containment lines close to it, they are building multiple “contingency” lines using bulldozers, chain saws and hand tools to create more barriers for the fire, he said. Those lines leave swaths of unburned fuel between firefighters and the fire, which could be dangerous if winds shift. In some cases, crews are starting backfires to burn the fuel before the larger fire can reach it.

Thunderstorms are especially dangerous for firefighters because of the possible sudden shifts in wind and fire direction they can bring, according to a fire incident update.

Meanwhile in Southern California, a fire near Las Cruces inSanta Barbara County that burned 80 acres and briefly shut down a portion of Highway 1 on Wednesday evening, was 40% contained as of Thursday morning and expected to be fully contained by Thursday night, according to county officials. The highway was reopened Wednesday night.