YOSEMITE NATIONAL PARK, Calif. — Crews working to corral the massive wildfire searing the edge of Yosemite National Park made major gains on the blaze overnight.

The fire was 60 percent contained as of Monday morning, up from 45 percent Sunday night, according to California fire officials. The blaze also grew about 9 square miles and now covers more than 357 square miles.

Full containment is not expected until Sept. 20

The blaze started Aug. 17 in the Stanislaus National Forest and two-thirds of the land burned since then is located there as well. The cause is being investigated. More than 5,500 structures are threatened.

 Clouds and higher humidity slowed flames from advancing through brush and trees on Sunday, giving firefighters room to set backfires, dig containment lines and to strengthen lines around threatened communities, fire spokesman Trevor Augustino said.

The 2-week-old Rim Fire moved up a spot to fourth on the state's list of large wildfires dating back to 1932 on Sunday when it grew to 351 square miles — an area larger than the cities of San Francisco, Oakland and San Jose combined, California Department of Forestry and Fire Protection spokesman Daniel Berlant said.
 

http://www.weather.com/news/yosemite-wildfire-update-weather-works-favor-firefighters-20130902