Police say the motor home stalled on the tracks at Broadway and California Drive. The two people inside tried to push it off the tracks, and the train tried to stop-- both unsuccessfully.
"We do know that a Union Pacific conductor and engineer applied the emergency brakes," said Burlingame Police Officer David Granucci.
There were no injuries, but a nearby restaurant, fortunately closed at the time, was damaged by debris.
One of the train's cars was carrying hydrochloric acid, but no leaks are reported.
The couple who owned the motor home were living in it, and pretty much lost all their possessions.