Three employees at a Carroll County greenhouse were injured, including a 65-year-old man who sustained severe injuries, after a hot water tank ruptured, fire officials said.

Firefighters responded to Catoctin Mtn Growers in Keymar at 5:05 p.m. Friday, according to a post from the Office of the Maryland State Fire Marshal.

First responders found the 1.1 million-gallon tank had ruptured and the 180-degree water had entirely spilled out, causing the building to partially collapse, the post said.

An overturned vehicle was also found tangled in the damage.

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The three injured employees were burned, according to Frederick County Fire and Rescue. The 65-year-old man was flown to Johns Hopkins Bayview Medical Center, fire officials said.

Catoctin Mtn Growers said in a post that the employee was in stable condition.

The water tank was on the south side of the 23-acre property, the business said in the post. Catoctin Mtn Growers said its retail greenhouse was not impacted and it will open for the spring this weekend.

The business is open from 8 a.m.-4 p.m. on Saturday. The greenhouse sells flowers and houseplants, according to its website.