Traffic was heavily impacted on the Interstate 15 Freeway in northwestern Fontana because a big rig was on fire on the afternoon of May 4.
The tractor/trailer burst into flames, causing some of the lanes on both sides of the freeway to be blocked for a period of time near Duncan Canyon Road.
There were no immediate reports of injuries.
In addition, a separate fire erupted north of Fontana in the Devore area earlier in the day. This fire burned 40 acres and was 50 percent contained during the evening hours.
One firefighter suffered a minor injury due to the Devore Fire, which was caused by a vehicle fire, according to a Twitter post by the San Bernardino National Forest.