This paper presents a thermal response analysis of an oval-shaped, horizontal tank lorry due to fire exposure. In the accident scenario, a chemical tank lorry containing methanol, in a loading/ unloading station, caught on fire as a consequence of a loss of containment of this flammable material. To analyze the fire dynamics on the tank lorry, a mathematical model is developed for the simultaneous fluid-flow and heat-transfer problem. An application is also made to predict the thermal effect on the tank lorry exposed to solar heating for extended periods of time.