We don't have enough air pollution already? Somebody probably violated a law or code, human "error" will be claimed, and now untold numbers of people have their lives messed up, there will be financial losses which will cause hardships, people and animals will be ill or die, and if there might be a fine that the company has to pay.
The chemicals will have moved into the air, and will most likely go much farther than the area evacuated. After all, if the truth were told, people might panic, or worse, decide that lawmakers have to make stricter laws regarding chemical waste. I suppose if we got really lucky, and people realized just how all encompassing the damage is to humans, critters, the air, water, folage and earth the public might rise up & make changes happen which would mean that the greedy gazillionaires would lose money.

By the way, if you hear on the news that N Korea does detonate that nuke bomb, then radiation poisoning is possible. If radioactive fallout gets into the atmosphere, it will likely go about the globe, and we will all need to have extra iodine to fight the radiation poisoning. I buck up with kelp tablets, & eat the dark chocolate.