They're saying it may have happened because of chemicals.
5:24 A.M. - UNDATED (AP) -- Hurricane Katrina damaged or displaced an estimated 58 Gulf of Mexico oil platforms and drilling rigs. The American Petroleum Institute says among those, 30 rigs and platforms have been reported lost. Tim Sampson, an A-P-I spokesman says no company breakdown was available.
National Guard scanner says that the industrial explosion/fire is just burning off used oil. "not toxic".