Another factor: Humans. Ninety-five percent of wildland fires are started by people, and just about 7 percent are arson, McLean said. The Mariposa County blaze now threatens 1,500 structures and is only seven percent contained. The fire has destroyed 29 structures and is threatening some 1,500 more structures, local media reported.
Roads were closed in the area to accommodate 2,200 firefighters and their equipment, officials said. By that night, it had grown to 2,500 acres. "It's certainly one of the bigger fires we've had this year- this is just another reminder of the conditions we're facing this year", said Isaac Sanchez, Cal Fire. The park remained open.
"It really put them in a precarious position", he said. The Detwiler fire is forcing dozens of animals to be placed in a shelter at Mariposa Fairgounds. Other communities that have been affected by the Mariposa Wildfire include; Hunters Valley, Bear Valley, Catheys Valley, Mormon Bar, Mount Bullion, the Yaqui Gulch/Agua Fria areas and Hornitos continue to be threatened, Cal Fire said.
Austin said a firefighter with a medical condition during the incident was transported to a hospital, evaluated and released immediately.
The Detwiler Fire continued to burn vigorously Tuesday evening. He went up to an overlook on Tioga Pass and saw the haze settling over the Yosemite Valley.
Kim Strauss didn't see the wildfire consume his California residence, but he says he'd be surprised if the home was still there. "More ash falling from the sky tells me it's getting closer".
Mark Couch, 47, who is homeless, said he had been staying at Mariposa's Heritage House, a home for recovering addicts and homeless people.
"We're not expecting an end until about August 5", Cal Fire Captain Koby Johns, told the local ABC News affiliate.
Though most of the smoke appears to be tracking northeastwardly, many areas throughout the Mother Lode have been impacted by the blaze known as the Detwiler Fire.