A chemical release at a north Toledo, Ohio, company prompted an evacuation of nearby residents, including some who described concerning health effects and an alarming foglike haze.

Glycol methacrylate, an industrial coating product, was released into the air Tuesday night, Toledo Mayor Wade Kapszukiewicz told reporters Wednesday morning. One person, a first responder, was injured and taken to the hospital, he added, but officials believe the injury is not serious.

Officials do not know what caused the chemical release, which the city clarified was not an explosion.

At 5 p.m.…