Some of these things are going to happen from time to time, manufacturing plastic comes with its risks which I see a plastics fire denoted here. I'm familiar with some polymer incidents and some make sense while others don't. Asphalt shingle manufacturer catches fire, not a big surprise. Fertilizer plant exploding is a big deal but that is a well known risk. Plastic manufacturer has stationary inventory in an unoccupied warehouse catch fire in the middle of the night and my eyebrows are lifted. I think a big problem here is that the investigators gravitate towards the quick/easy way to end the investigation.