All lanes of westbound Interstate 90 were closed near Preston after a collision and fire Wednesday afternoon, according to WSDOT.
The area is west of Preston-Fall City Road Southeast, near milepost 21.
According to the Washington State Patrol, one car stopped to avoid debris in the roadway, when it was struck from behind by a second car.
The cars caught on fire, igniting the brush on the sides of the road.
Three people were taken to a hospital with non-life-threatening injuries.
Just before 4 p.m., one lane westbound was open to traffic.
At 3:53 p.m., all lanes were reopened to traffic.