RICHMOND, Calif. (AP) — Officials say they have internal surveillance video that shows a volatile vapor cloud before a fire broke out at a Chevron Corp. refinery last week.
U.S. Chemical Safety Board officials said Tuesday that the video shows a number of plant workers within the cloud shortly before the Aug. 6 blast.
The vapor cloud was estimated to be about 150 to 200 feet high, as tall as the refinery tower.
The blaze knocked an important refinery unit offline, reducing the facility's production and sending thousands to hospitals with breathing complaints.
