A crash involving two overturned semi trucks has closed State Route 18 at Issaquah-Hobart Road near Maple Valley.
One of the semi trucks went the wrong way and slammed into the other truck.
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Backup is significant. Washington State Patrol Trooper Chris Webb says the road will be closed for several hours.
Emergency crews are on scene taking at least one person to the hospital.
An Evergreen semi truck is completely overturned on the road, and another semi truck is jack-knifed with the back of the truck overturned.
A detour is set up at Issaquah-Hobart Road. Crews may periodically open the road, but it will close again when tow trucks arrive.
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Webb says the scene will be a lengthy recovery.
Stay with kiro7.com for updates on this developing story.