smelled the smoke. their symptoms were -- like the cheap described, burning sensation in their throat. burning sensation in their eyes. most of the symptoms that we expected they would feel -- if they are outside the 1.5-mile radius zone, we do not expect anybody to experience any of those symptoms. >> reporter: i know there was a second plan that was ultimately compromised, the generators were flooded out. what's been done to learn from this? >> sandra: that's an executive from the arkema chemical plant, where we have been witnessing that fire that is basically at the harris county fire marshal said, it has put itself out. you can still see the black plumes of smoke. very little wind. he said it did not put citizens in that area in trouble or at risk but they require a 1.5-mile evacuation zone.