Traffic was slow Thursday morning on the westbound 10 Freeway and the 605 Freeway.
The cause of the tanker fire has not been determined. The tanker was carrying about 8,800 gallons of gasoline before it exploded into flames.
A column of black smoke billowed from the tanker as about 200 firefighters from Montebello and the Los Angeles County Fire Department converged on the area. The fire was extinguished at about 1 p.m.
"The wind conditions were such, it was kind of pushing the fire to the south and to the east,'' said Montebello Fire Department Chief Tim Wessel. "Unfortunately, that put the main part of the fire further under the bridge, causing further damage to the bridge.''
The vehicle's driver and a passenger were able to escape.