Possibly one of the biggest NJ mutual aid responses in recent history. Some of the units involved.... Sayreville, South River, Perth Amboy, South Amboy, Avenel, Spotswood, Monroe, Old Bridge, East Brunswick, New Brunswick, Cranberry, Plainsboro, Lauernce Harbor, Manalapan, Cheesquake, Hopelawn, Milltown, Metuchen, Princeton Junction, Elizabeth ave. fire company (somerset), Somerset Fire and Rescue (somerset), Middlebush(somerset), Little Rocky Hill (somerset). Seems that the fire is at the DuPont chemical factory on the old Hercules plant grounds with units experiencing multiple water problems.