One lane of northbound Interstate 5 at Grapevine Road has been shut down due to a trailer fire.
According to the California Highway Patrol, a big rig's brakes and trailer caught fire just before 2:30 Tuesday morning.
The big rig was able to pull over into the right hand shoulder, but has caused the CHP to shut down the No. 4 lane.
Environmental Health has been called to help with cleanup.
Right now there's no word as to when the lane will be reopened.