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PORTLAND - Firefighters, tree trimmers and electrical crews kept busy Friday as winds toppled trees and power lines around the Portland area.

Wind caused a large tree to snap and fall across Highway 99E at the Clackamas River Bridge between Oregon City and Gladstone.Two vehicles were damaged and the roadway was closed for an hour, but no one was injured.

Police closed Barbur Boulevard nearTerwilliger after a tree fell on a transformer, causing a fire.

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A two-alarm brush fire broke out on Hayden Island near North Interstate Avenue shortly before 2 p.m.

Portland General Electric reported several thousand customers were without power from Milwaukie toBeaverton Friday.

More:PGEOutage map

Clackamas County College inOregonCity canceled classes and activities Friday after the power went out. No injuries were reported.

PGEsaid all outages were wind-related. On Thursday, crews restored power to more than 2,700 customers in Northeast Portlandafter a downed tree took out a power line.

Tree experts say when there's less moisture in the wood and fibers, trees are not as flexible and more receptive to wind, ice and snow damage.

KGWReporterKeely Chalmers contributed to this report

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