Car fires aren't uncommon and a gasser that catch fire (open fire that is, not just smoking wires) is more or less impossible to put out before the car is a complete wreck. Here's some info you could show your employer if you like to pursue this:
http://www.usfa.fema.gov/downloads/pdf/tfrs/v2i4.pdf
http://www.usfa.fema.gov/downloads/pdf/tfrs/v2i4.pdf