TUOLUMNE COUNTY, CA - A reverse 911 call has been made and sheriff's deputies are going door-to-door in Tuolumne City and Ponderosa Hills to advise residents to evacuate because of the encroaching Rim Fire.

The evacuation is advisory, but the Tuolumne County Sheriff's Office said now is the safest time to leave.

Thefire in Stanislaus National Forest ignited Saturday afternoon. It has blown up to125,620 acres with only5 percent containment, according to the U.S. Forest Service and Cal Fire. It is burning northeast of Groveland, consumingbrush, oaks and pines.

Flames have entered the northwest side of Yosemite National Park. The park remains open.

Fire crews are having trouble with directly suppressing the flames because of inaccessible and steep terrain.

There are 4,500 structures threatened, fire officials said.

As of late Thursday morning, the Rim Fire had destroyed four homes and 12 outbuildings.

VIDEO: Rim Fire grows, destroys 9 structures

Ground crews got assistance from air attacks by Maff C-130s,military cargo planes,and V-LAT DC-10, large air tankers. About2,672 people are helping battle the fire.

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