I saw this on the news Wednesday in Memphis. It looks like the fire started in the front of the truck being towed. I feel sorry for those people although no one was injured.
Another thing to think about is most safes are located in the bedroom closet or under the bed. By the time you see this situation in your mirror or are flagged down by a motorist, it would be too late to unlock a safe with valuables.
I sure hope everyone was OK. Terrible thing to go through.