UPDATE (1:30 p.m.)
I-35 southbound near West at mile marker 356 is open again and the roadway is clear.
ORIGINAL STORY
All southbound traffic on I-35 at mile marker 356 just north of West is shut down — traffic is being diverted to the frontage at Exit 356.
Texas DPS troopers responded to a semi-truck trailer on fire around 8 a.m. Wednesday, and Texas DPS is now taking over the scene.
Delays are expected to last up to eight hours as crews clean up the scene and complete roadway assessments.
