A tractor-trailer hauling cardboard that caught fire near the Grapevine caused headaches for drivers on southbound I-5. A mechanical problem is being blamed for sparking the fire around 3:30 Wednesday morning as the driver was going up the grade. The CHP says it was hard for county firefighters to put it out because the cardboard kept reigniting.

The number 2, 3, and 4 lanes were closed for at least eight hours with traffic backing up to Laval Road.

Kelli Pierce