What happens to the man in the story To Build a Fire when he falls into the icy water?

From the text:

And then it happened. At a place where there were no signs, the man broke through. It was not deep. He was wet to the knees before he got out of the water to the firm snow.

Now he would have to build a fire and dry his moccasins and socks.

His feet and hands were the first to feel its absence. His wet feet froze first. His bare fingers were numb, although they had not yet begun to freeze. Nose and face were already freezing, while the skin of all his body became cold as it lost its blood.