Hazardous materials released by fires are a hazard for firemen and that is what makes it a  risky job Firemen still suffer from chemicals and materials released at the World Trade Center. We need to make ithe firefighters as safe as possible though— with state of the art training and gear and procedures. You cannot figure these things out as you fight the fire. Safety for firefighters and other emergency responders is another reason to have fire sprinklers in buildings like Marco Polo where hazardous materials will be released by a fire or fighting the fire.