Another retired firefighter who answered duty’s call during the city’s darkest hour has died of 9/11-related illnesses, according to the FDNY.

Thomas Dunn, a former member of Engine Company 234 in Brooklyn, passed away due to illnesses resulting from his heroic response to the events of September 11, 2001, the FDNY’s Family Assistance Unit announced in a social media post.

The unit recognized Dunn’s dedication to the department, having served for 7 years and always stepping up when his city needed him most. They extended their condolences by stating, “May his memory be a blessing and may his soul rest in eternal peace.”

The Uniformed Firefighters Association, an organization dedicated to advocating for the well-being of the city’s firefighters, expressed their sorrow at the loss of Dunn, highlighting the impact of his service and the sacrifices made in the line of duty.

“His family has already endured great loss, including the passing of his brother, [firefighter] Jimmy Dunn of [Ladder] 114, eight years ago,” the organization wrote. “Please keep his father and loved ones in your prayers … NEVER FORGET.”

Several of Dunn’s former first responders posted their condolences to Facebook, with one — Peter Blaich — lamenting that his pal was “taken way too soon.”

“It seems like yesterday we were turning out and fighting fires,” Blaich wrote in one group. “I will have a toast tonight to all the brothers from Schenectady Avenue, for working with you was indeed an honor.”

More than 370 firefighters have now died of 9/11-related illnesses in the years since the terrorist attack, which killed 343 firefighters and nearly 3,000 people overall.

Dunn’s family will hold a private service in Florida, where he lived.