They're known for their courage. And this time of year it's often the elements they're braving. Because on a 17-degree day, the water they bring to the fight, turns on them and equipment can clog in the extreme cold.
And firefighters have to keep themselves from freezing, layering up to keep warm out on a ladder, but not too hot when their up close to the flames.
But even if they get their gear right on the inside, they still have to deal with what the ice can do on the outside.
NewsChannel Five On Your Side's Casey Nolen gives us an up-close look at what it takes to fight fires in the freezing cold.