A burning big rig trailer closed Interstate 635 early Tuesday morning, snarling eastbound traffic on Texas 114 into Grapevine.
Grapevine police and firefighters found the 18-wheeler trailer engulfed in flames on the 3000 block of eastbound I-636 at about 1:20 a.m. Crews were able to extinguish the fire about an hour later, firefighters said.
It's unclear what caused the truck to catch fire. No injuries were reported.
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Police warned drivers to avoid the area as crews cleaned up the charred trailer, which appeared to be hauling food products.
The eastbound ramp to I-635 was reopened several hours later.