Dylan Cunningham, a South Holland firefighter died during an underwater dive training exercise Wednesday. Cunningham, of Thornton, was pronounced dead about 10:40 p.m. Wednesday at Northwestern Memorial Hospital, according to the Cook County medical examiner’s office.

The specific manner of death for the 29-year-old firefighter’s has not been determined. The incident related to his death that occurred at Haigh Quarry Lake is under investigation.

An image shared by several fire departments in the Chicago area shows Cunningham’s jacket lying atop the front of a South Holland Fire Department engine — a symbol of honor and respect for the late firefighter.

“Our condolences go out to the South Holland, IL Fire Department,” the Hobart Fire Department wrote in a Facebook post, with the photo attached.

Hammond fire officials likewise expressed a somber reaction to Cunningham’s death.

“Our hearts go out to the South Holland Firefighters Union and the Family of Brother Dylan Cunningham,” the department posted.

The department encouraged the public to send condolences to the South Holland Fire Department and to watch for details on an upcoming procession.

Dylan Cunningham

Cunningham served as a South Holland firefighter since 2011. He started as a part-time firefighter before joining the department full time in 2018. He was also a member of the Illinois Army National Guard since 2012, according to village officials.

“As you can imagine this is a very difficult day for all of us,” said Julia Perla Huisman, a spokeswoman for the village. “It was just in February of 2018 that Pat Mahon and I swore Dylan in as a firefighter paramedic. He truly was a very special young man.”

Mahon asked that the public support Cunningham’s family in any way possible.

“We ask that you keep Dylan’s family and loved ones in your thoughts and prayers,” Perla Huisman said.

Late last month two New York responders were killed in a motor vehicle accident.