About 50 cars, including 10 carrying hazardous materials, derailed in a fiery crash in East Palestine, according to rail operator Norfolk Southern and the NTSB. LATEST COVERAGE: https://www.10tv.com/article/news/local/ohio/toxic-gases-ohio-train-derailment/530-fefec7a3-dc1e-4fb4-ac8b-f8fb653bd3ca A big fireball and billowing smoke rose into the sky when officials released and burned toxic chemicals from the wreckage of a derailed train in an Ohio village. Residents in the immediate area there and nearby in Pennsylvania remain evacuated Wednesday because of health risks from the fumes. Officials warned that burning the vinyl chloride would result in two concerning gases — hydrogen chloride and phosgene, which was used as a weapon in World War I. Officials say air monitoring hasn't detected concerning levels inside or outside the evacuation radius, and they're still working with experts to determine safe levels for various gases before residents can return.