Montana train derailment causes hazardous material spill into Yellowstone River.

A train derailment in Montana caused ten trains to derail, with six carrying asphalt, three carrying molten sulfur, and one containing ground-up scrap metal. A car containing sodium hydrosulfide that was close to the river was moved by Sunday afternoon and will be re-railed in a secure location, according to Montana Rail Link (MRL). Water quality sampling is being performed by a contractor on behalf of MRL, with oversight from the Montana Department of Environmental Quality. Preliminary results reportedly do not show petroleum hydrocarbons or sulfur impacts to water quality.