Washington’s three largest wildfires continue to influence air quality across Grant and Adams counties

The Sinlahekin Fire is the largest blaze in Washington at around 154,162 acres and 44% contained. The fire has an estimated cost of around $100 million, also making it the most expensive active blaze in Washington as of Tuesday.
COURTESY PHOTO/INCIWEB

by NANCE BESTON
Staff Writer | August 19, 2026 3:30 AM

MOSES LAKE — The three largest wildfires currently burning in Washington state remain the Sinlahekin Fire in Okanogan County, the Kaiser Canyon Fire on the Colville Reservation, and the Little Giant Fire in Chelan County. Together, the fires have burned more than 428,000 acres and continue to generate smoke that is affecting air quality across portions of North Central Washington, including Grant and Adams counties.

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