“Four workers suffered minor injuries after a large explosion Wednesday morning at the Exxon Mobil refinery in Torrance, according to an Exxon spokesman.
Residents in the area were asked by police to remain indoors after the explosion. That shelter-in-place order has now been lifted, but a smoke advisory has been issued by the South Coast Air Quality Management District.”
Source: California refinery explosion injures four, damages facility – LA Times
