I'm not sure those are firefighters, and not just local citizens trying to help. There's no turnout gear in the photo.makes me wonder if local fire departments have any knowledge of Amtrak equipment, or how best to gain access for rescue purposes.
Anyway, the odds of a twice-daily passenger train derailing and flipping within any one particular jurisdiction are so infinitesimal, why would every small town along an Amtrak line train for it?