>Is there acid rain in Ohio?
Acid rain could have formed after the controlled release and burn of chemicals on Feb. 6, Kevin Crist, professor of chemical and biomolecular engineering and the director of the Air Quality Center at Ohio University, said. If it did form and fall, it would have most likely occurred downwind of East Palestine.
"There would maybe be localized problems, but once that plume is gone, it's gone. Unless it's sticking to a residue," Crist said.
Vinyl chloride in the atmosphere breaks down into hydrochloric acid, a component of acid rain. East Palestine residents may want to wipe down surfaces in homes for possible residual material, Crist added.

From the Cincinnati Enquirer (updated as of 1:44 pm)