The accident occurred on November 22, local time. A freight train carrying dangerous goods derailed in Kentucky, USA, on the afternoon of the 22nd, causing a fire and releasing toxic gases. On the 23rd, the local emergency department actively detonated vinyl chloride. Residents within several kilometers were evacuated.

However, just two days later, the local government told residents to go home and said preliminary tests showed "the local air and water are safe." But the air is still filled with a pungent smell, chemical pollutants appear in the streams, and some people have experienced a series of symptoms such as headaches, nausea, coughing up blood, chest pain, and eye burning. Some residents even said that ten minutes after returning home, their lips changed color that night and bright red patches appeared on their faces.
"Living in an environment full of toxic gas, no one seems to really care about us." Even a derailed car of the "toxic train" was parked in a resident's backyard for many days without any government removal or environmental testing. Residents said they had not received any help except for the media that started reporting here two days ago.
According to an informal notice sent to the company by the U.S. Environmental Protection Agency during the incident, three other toxic chemicals were leaked after the incident, including ethylene glycol butyl ether, isooctyl acrylate and isobutylene. In the words of Ohio hazardous materials expert Ciel Caggiano, the accident was equivalent to "bombing a small town with chemical weapons."