Amazing Spider-Man 440 pg 19

Spider-Man has backtracked to figure out what happened to the Molten Man, discovering that he has escaped by melting through the floor of the building and escaping into the sewers. He begins following the steam generated by the heat of Molten Man's body reacting with the sewage water. However, as he gets closer, the wall-crawler quickly discovers that the heat is too intense to continue and is forced to flee the sewers. Changing tactics, Spider-Man returns to the surface and uses a map to try and figure out where Raxton was going