Firefighters report "good progress" against CA Rim fire [UPDATE] SACRAMENTO, Aug. 25 (UPI) -- The Rim fire spread east and northeast Sunday on the edge of Yosemite National Park but officials said they were "making good progress." The blaze has burned more than 133,000 acres -- more than 200 square miles -- since it was first reported Aug. 17 in Stanislaus National Forest. Firefighting teams reported "significant progress" along the western edge of the fire Sunday, the San Francisco Chronicle reported. "We are making good progress," CalFire spokesman Daniel Berlant said. It hasn't grown at the rate it did earlier this week. With the fire 7 percent contained Sunday, fire crews from across the state were focusing their efforts on protecting threatened communities in Sierra Nevada foothill communities around Tuolumne City, and in Yosemite Valley, the most popular part of Yosemite National Park. The fire has destroyed at least 23 structures and threatens more than 4,000 others, state fire officials said. There had been concern the fire might disrupt water and electricity supplies for San Francisco. There had been no interruption in the water supply by Sunday but two of the city's hydro power generating plants had to be evacuated -- forcing San Francisco to buy supplemental power under reciprocal agreements with other power companies, the Chronicle reported. The fire is the 15th largest in the history of the state, the Los Angeles Times reported. Fed by hot, dry and windy weather, and consuming dry, dense forestation, it has doubled in size since Thursday, but the degree of spread has been less severe each of the past two days, the Chronicle reported. The cause of the Rim fire is under investigation. While the Rim fire was by far the largest currently burning in the state, at least nine other wildfires were burning Sunday in California.