I am well aware of the FBI alert.
This one single fire does not fit a terror MO.
I worked in these plants for twenty years. One of them had fires like this 5 times in two years.(I have worked in this one)
The photo's show that the fire is confined to one area, (the furnace) and is totally controlled.(we used to call them heaters. They are big.) They are letting the chems burn off.
Do you feel terrorized?
I don't.
If you do, you need to seek counseling.
As a man who lived through the threat of atomic bomb threats for many years, I can tell you that this is not terror!