GEORGIA – A fire at a Georgia chemical plant apparently caused by a sprinkler head malfunction Sunday morning is forcing evacuations, including of a local hospital, and road closures in the area, according to Rockdale County officials.

The incident unfolded around 5 a.m. ET at BioLab in Conyers, Georgia. Water from the malfunctioned sprinkler head “came in contact with a water reactive chemical and produced a plume,” county officials explained on their website. CNN has reached out to BioLab, described as a manufacturer of pool and spa treatment products, for comment.

A fire broke out on the roof and firefighters were able to contain the blaze, but the fire reignited hours later, Rockdale County Sheriff Eric Levett said in a video message posted on Facebook. “I want to strongly ask all of you to please spread the word to stay away from this area at this point,” Levett said. “It’s burning pretty good. We’re trying to get that under control, but at the same time we’re also trying to get the traffic under control.”

Roads are closed in the area, and residents between Sigman Road and Interstate 20 were asked to evacuate. Additionally, the interstate is blocked in both directions between Salem Road and Turner Hill. The sheriff said he will ask for assistance from the Georgia Department of Public Safety and the Georgia State Patrol. Residents north of Sigman were asked to shelter in place and keep their windows closed.

Conyers Mayor Vince Evans urged residents who choose not to evacuate to stay in place and not wander or drive around the city.  “This is not the time to do any type of sightseeing. We are strongly encouraging everyone, no matter where you’re coming from, but especially Rockdale residents, to stay out of this area,” Levett added. Rockdale County Chairman Oz Nesbitt told CNN’s Jessica Dean it’s an “all hands on deck” situation.

“All of our resources have been dispatched and deployed,” Nesbitt said. “Every available agency, GEMA, FEMA, everyone is on deck here in Rockdale County, we’re managing this situation as we try to get it under control.” Aside from area homes and businesses, a local hospital is also being evacuated, he said, and environmental safety officials are conducting air quality tests to determine if there are any toxins in the smoke. “We’re not taking any chances,” the chairman added. The roof of the chemical plant building has since caved in and Nesbitt described the damage as a “complete collapse.” Residents in neighboring Newton County on Sunday also received an alert about the situation in Conyers. (CNN)…[+]