Elon University Poll surveyed hundreds of NC adults after the deadly Charlotte train stabbing and mass shooting in Southport.
Authorities have said the wreck was not hazardous and there was no environmental harm.
A temporary shelter-in-place order was lifted early Sunday morning after officials determined there was no risk to public health, officials said.
"They're all scientists, they're sitting up here telling us nothing is wrong," one resident said in a heated exchange with Mayor Trent Conaway. "I want you to tell me why everyone in my community is getting sick!"
Rescue workers are in a desperate search for survivors after a head-on collision between two trains in northern Greece killed dozens of people and injured scores.
Ohio Gov. Mike DeWine said 4,832 cubic yards of soil have been removed from the ground in East Palestine and about six truckloads were on the way to Michigan.