We now know what started the fourth largest wildfire in California's history. U.S. Forest Service officials say the Rim Fire burning in parts of Yosemite began after a hunter allowed an illegal fire to escape.
Forest officials also say this fire was not connected to an illegal marijuana grow as earlier reported.
The news comes as more firefighters are being sent home from the fire. Some firefighters have been working 16-hour days for the past two weeks.
The fire still covers 370,000 acres, and is 80% contained.
Fewer than 4,000 firefighters are still on scene.