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.
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.