About 1,800 firefighters are on day ten of containing the American Fire in the Tahoe National Forest.
Hand crews, water tenders, dozers and other assistance are working on the fire that has nearly burned 15,000 acres.
Steep terrain and thick hazy conditions have been making it tough for crews to work through. A newly issued red flag warning of showers and thunderstorms increase instability and risk of flooding.
Containment is slightly over 50 percent and the fire is primarily burning an area that has had no previously recorded fire history, according to the U.S. Forest Service fire behavior forecast.
Heavy smoke continues to consume the valley and many crews are working 24 hour shifts as resources spread thin.
Nicole Yi contributed to this report.