Originally Posted by NJLOAD
Is that in response to the refrigerator running?
Yes. Have seen it twice both times on I-10 near Houston, Texas ironically. The explanation we were given (it was my parents who had called 911 as I was still at teen at the time) was that the propane had been left on to keep the fridge running and something had happened to sever the lines and cause a spark igniting the propane. Could they have been wrong? Possibly. It sounds like a reasonable cause/effect but I guess there's no way to 100% know for sure.
I can tell you that we travel with our propane off at the tanks.
In both instances that I saw- all the people survived. One was a TT and the other was a fifth wheel. Both trailers were burned to a crisp with just the metal frame left and some random debris. It was absolutely terrifying.