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Nearly 2,000 firefighters were added Tuesday to battle the massive Northern California wildfire threatening thousands of homes, in anticipation of erratic winds and hotter temperatures that could undo their progress.

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Tim Flaherty, of the Fresno, Calif., Cal Fire crew, takes a break from lighting a mountain side with a drip torch while fighting the King Fire in Mosquito, California.Marcio Jose Sanchez/The Associated Press

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Firefighters hold the line with water hoses during a controlled burn while fighting the King Fire in Mosquito, California. Strike teams from Fresno and El Dorado Cal Fire worked in conjunction with department of corrections crews in an offensive firing tactic, intended to take away fuel from the main fireMarcio Jose Sanchez/The Associated Press

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The King Fire descends from a mountain in Mosquito, California.Marcio Jose Sanchez/The Associated Press

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A firefighter hoses down hot spots while fighting the King Fire in Mosquito, California. Strike teams from Fresno and El Dorado Cal Fire worked in conjunction with department of corrections crews in an offensive firing tactic, intended to take away fuel from the main fire.Marcio Jose Sanchez/The Associated Press

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Fishermen and joggers continued to enjoy the Sparks Marina just east of Reno, Nevada, while a smoky haze continues to drift in from California's King Fire nearly 100 miles away.Scott Sonner/The Associated Press

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Much of the downtown Reno skyline is barely visible through a smoky haze in this view from neighboring Sparks, Nevada.. For the second day in a row, the National Weather Service issued a ``dense smoke advisory'' for much of the Sierra's eastern front as the area continued to be inundated with smoke from California's King Fire nearly 100 miles away.Scott Sonner/The Associated Press

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A firefighter is surrounded by smoke while fighting the King Fire in Mosquito, California.Marcio Jose Sanchez/The Associated Press

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Fire chief Barry Bierman, of the Sonoma Lake Napa Unit Cal Fire crew, communicates through a radio while fighting the King Fire in Mosquito, California.Marcio Jose Sanchez/The Associated Press

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A firefighters sets a controlled burn with a drip torch while fighting the King Fire in Mosquito, California.Marcio Jose Sanchez/The Associated Press

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