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MALAGA, Wash. (AP) -- A fast-moving brush fire in central Washington has prompted the Chelan County sheriff's office to warn residents of about 40 homes that they might need to leave.

So far, there's been no reports of injuries or structures damaged.

However, Chelan County Public Utility District spokeswoman Kim Craig said Wednesday night that power transmission lines have been damaged in several areas along the Malaga-Alcoa Highway, temporarily knocking out power to an Alcoa smelter and to more than 400 PUD customers.

Sheriff's special operations chief Jason Mathews says affected residents have just been advised that a fire is nearby.

Fire crews from all over the Wenatchee Valley have responded to fight the fire south of Malaga. It was first reported late Wednesday afternoon. There was no immediate estimate of its size or the cause.

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