Safety oversight may be a federally regulated responsibility for railway traffic like hazmats and crude oil.
However, responding to an actual derailment and possible fires and evacuations of nearby people is the clear responsibility of local community and state agencies. Governors, mayors, and fire fighters are wrestling with technical issues on how to be better prepared. With or without federal help.
Here, briefly, is how rail experts in Virginia see the local and state technical issues. Other states like Pennsylvania and Minnesota are tacking the question for their elected officials. Reports from those states on improving and managing rail safety are expected later this month.