MIDDLETOWN, R.I. (AP) — A malfunctioning steam room at a YMCA in Rhode Island pumped out so much steam that it triggered an a sprinkler system alarm on Saturday morning, prompting an evacuation.

In a statement, the Middletown Police Department said officials rushed to the Newport County YMCA in Middletown around 9 a.m. for a possible explosion but later learned an excessive amount of steam had set off the building’s emergency sprinkler system.

A 58-year-old woman was hurt but officials said it was a minor injury. The YMCA would remain closed Saturday, police said.