UPDATE: A second fire broke out at Lonza Chemical in Charleston Wednesday evening.

Channel 3's crew at the scene confirmed the small fire started in the same area of the plant where a fire happened on Wednesday morning.

Lonza security says the fire did not force an evacuation of employees.

Security says no chemicals were released from the plant.

PREVIOUS STORY: An investigation is underway in Bradley County to determine what caused a chemical fire at a Charleston plant.

The fire at Lonza Chemical prompted a community-wide alert around 5:00 Wednesday morning telling residents to get inside immediately.

The all-clear has been given now.

The first message sent to Charleston residents told them to go inside and stay there until further notice.

A chlorine fire at a Lonza Chemical warehouse prompted the community alert.

Company officials say a firefighter and security guard were treated on the scene and are expected to be okay.

"We practice with Bradley Emergency Services routinely. So, that practice, it really came into play this morning," Lonza Chemical Senior Director of Manufacturing Tom Wilkerson said.

It took an hour to get the fire under control.

Officials don't know what started the fire in an area that holds pool chemicals that have to be handled carefully.

"When you put this in a pool, you want to put the whole package. If you put in a one pound package, in at one time," Wilkerson added.

A second alert gave residents the all clear about 60 minutes after the first, saying it was safe to go outside and no product left the site.

Officials say runoff water is treated on site as a preventative measure to keep nearby waterways clean.

To sign up for those alerts, text CHARLESTON to 888-777.

To get alerts for Cleveland and Bradley County, text CBCEMA to 888-777.

If you receive a shelter-in-place message, you need to find a safe location indoors and stay there until you're given an "all-clear" or told by authorities to evacuate.

While you're inside, you should:

  • Close all doors and windows
  • Turn off all fans, heating systems and air conditioning units
  • Close fireplace dampers and other vents
  • Go to an above ground room (not a basement) with as few windows and doors as possible.
  • Make sure to take your home emergency supply kit with you.

Stay with Channel 3 for updates on this story.

PREVIOUS STORY: Bradley County Emergency Management Agency says the fire is under control.  Dispatch says the call came in around 4:20 Wednesday morning. 

Residents, who were asked to stay indoors, may resume normal activities, according to the Bradly County EMA.

The company's website shows that Lonza in Charleston, also known as Arch Chemicals, employees 280 people. 

This facility is a manufacturing site for calcium hypochlorite (HTH) and related pool and spa products. HTH is a pool chemical that will combust if it gets wet.

Bradley County EMA officials tell Channel 3 that no injuries were reported, but one firefighter wasn’t feeling well but after a few minutes was fine. The firefighter was not treated nor transported.

PREVIOUS STORY: Cleveland/Bradley EMA sent out an alert Wednesday morning telling residents to stay inside due to a fire at the Chlorine warehouse at Lonza Chemical.

The warehouse is located on Old Lower Mill Road.