Crews clear wreckage after ‘superfog’ pile-ups leave at least seven dead

In this aerial photo, responders are seen near wreckage (AP Photo/Gerald Herbert)

Crews are working to clear the wreckage of more than 150 vehicles involved in a series of crashes near New Orleans caused by a “superfog” of marsh fire smoke and dense fog that killed at least seven people and injured another 25.

An estimated 158 vehicles were involved in the incident on Interstate 55 on Monday, according to Louisiana State Police, who warned on Monday night that the death toll could climb as first responders looked for victims.