Also, is it an atomic bomb like one used on Hiroshima and Nagasaki, If so, NO body in a close enough distance should be alive and the whole place would be a ruined waste land. AKA, all track would be destroyed, metals all melted and burnt up so no engines in distance should even be running, let alone be alive.
@KerrySanchez-gc3oe I can explain what happened to thomas. He got mutated and infected by the radiation and left the branchline. he told toby to take care of annie and clarabel for him so that he can rest in peace.