https://en.wikipedia.org/wiki/Lac-M%C3%A9gantic_rail_disaster
The Lac-Mégantic rail disaster occurred in the town of Lac-Mégantic, Quebec, Canada, on 6 July 2013, at approximately 01:15 EDT,[1][2] when an unattended 73-car Montreal, Maine and Atlantic Railway (MMA) freight train carrying Bakken Formation crude oil rolled down a 1.2% grade from Nantes and derailed downtown, resulting in the fire and explosion of multiple tank cars. Forty-seven people were killed.[3] More than thirty buildings in Lac-Mégantic's town centre, roughly half of the downtown area, were destroyed,[2][4] and all but three of the thirty-nine remaining buildings had to be demolished due to petroleum contamination of the townsite.[5] Initial newspaper reports described a 1 km (0.6-mile) blast radius.[6]