In New Jersey, fire officials say a massive chemical blaze at a chlorine manufacturing plant in Passaic could have turned into one of the most catastrophic chemical disasters in the region if firefighters hadn’t quickly responded. The fire at Majestic Industries and the Qualco chemical plant burned through Friday night and into Saturday morning. The smoke was so thick it was seen and smelled in New York City. Hundreds of firefighters were deployed; one of them was injured.