These Caldor Fire before (top) and after photos provide a stark visual of the fire's impact, revealing charred buildings and blackened forests beneath a smoke-filled sky. The Caldor Fire tearing through northern California has forced evacuations of one of the state's most popular resort areas. Much of idyllic lake town South Lake Tahoe is under an evacuation order and a red flag warning is in effect across the Northern Sierra region. Firefighters have been battling the blaze for two weeks, and Gov. Gavin Newsom was forced to declare a state of emergency in El Dorado County earlier this month. The fire has burned over 276 square miles, destroyed more than 470 homes and injured at least five people, but is only about 15% contained. Conditions on the ground have worsened since Sunday. Crews face low humidity and gusty winds as the fire races east and threatens to reach Lake Tahoe, but the California Department of Forestry and Fire Protection expects full containment by Sept. 8. 📷: Kaylie Carter, Getty Images, Sierra at Tahoe #CaldorFire #wildfires #SierraTahoe #LakeTahoe #California