Weeks after a fire at a cold storage facility in Boyle Heights, the warehouse operator's ’s own data — buried in online reports — shows some unsafe ammonia levels.

The brown swath of evergreen trees is a clear sign of how life has changed near the site of a deadly pipeline leak in Burt County, Nebraska.

A father and his two young children were among five fatalities in a multi-vehicle crash involving a semi-truck carrying potentially toxic anhydrous ammonia in central Illinois, authorities said. Late ...