I'm less concerned that they didn't get the worst case exactly right, than I am about their lack of transparency about exactly what chemicals are there, and what the possible effects will be. That kind of secrecy and lack of forthrightness is almost always counterproductive in the long run.....unless of course they really do have something to hide.

Smoke from those chemicals combustion is already spreading off site. Some of the original chemicals, or combustion products from them will certainly be spread by the flood waters. Seems to me that the public deserves some straight answers. More than just "...don't worry, ....it's just like campfire smoke....trust us..." or words to that effect.