The double tanker truck erupted into flames after crashing into a guardrail near Washington Boulevard around 9:40 a.m. Sunday. A Good Samaritan pulled the driver out of the wreckage.
The truck driver suffered burns over 40 percent of his body. He was taken to a hospital in critical condition. The Good Samaritan suffered minor burns to his hands.
Northbound lanes of the 710 Freeway were opened by about 11:30 a.m. Sunday.