PORTLAND, Ore. (KOIN) -- The Flat Fire, which started Thursday about 3 miles west of Lake Billy Chinook, has exploded to around 18,000 acres, is 0% contained and has prompted a variety of evacuation levels in two counties..

The Oregon State Fire Marshal invoked the Emergency Conflagration Act to send more resources to help battle the blaze. As of Saturday afternoon, the Jefferson County Sheriff's Office said "resources and fire personnel are working around the clock to fight it."

Flat Fire -- Facebook page from Jefferson County Sheriff's Office Flat Fire -- Facebook page from Deschutes County Sheriff's Office

Level 3 "Go Now" evacuations are in place for "everything east of SW Lower Bridge Road up to the Deschutes River" on the Crooked River Public Lands Two.

Level 2 "Be Set" evacuatio

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