Update 9:54
The semi- has been towed off the scene, all lanes of SR 18 are back open.
Original Story:
As if 9:09 AM this morning, Highway 18 is completely blocked near the summit due to a semi fire. (MP 20)

Eastbound travel is being diverted to Issaquah Hobart Road. The Washington State Patrol is on the scene.

No injuries and no estimated time for reopening. More info to come.