Is it? Perhaps, but there are many factors that need to be considered such as the amount of heat, what burned (gas, diesel etc) has various degrees of temperature output. How long did this burn? The winds are a factor. At this time we don’t know the facts, if we are ever told. My question is: why the hell would a tanker stop under the overpass to burn? Common sense would be to pull over as far away from other structures as possible or did the driver just flee at a very bad moment?