I know we do not get tornadoes where I work, but I do know our SSI has instructions on what UP does with tornadoes. But I think that the carriers like to gamble with mother nature, last summer we had a pretty serious forest fire on one of our runs. UP didn't give a shit, ran a fire train ahead and behind every train. Issued us all el cheapo respirators and ran as many trains as they could through. Hazmat key train **** it, oh the fires jumping the right away high ball!