The infant and his mother were stabilized and taken to an area hospital, WXYZ reported.
"The first responders saved the kid's life, no doubt about it," Fornell told the television station.
Firefighter Marcus Moore told WJBK the baby was full term and weighed about 7 pounds. He said he was glad his crew was able to save the child.
"You just want to do the right thing, so that you get the right results," Moore told the television station. "We were fortunate to do that today. It was surprising, the age that she was, I am pretty sure she was scared. But that's why we are here -- to take care of those situations."