NEW ORLEANS (AP) — Authorities say at least seven people have been killed after a “superfog” of smoke from south Louisiana marsh fires and dense fog caused multiple massive car crashes involving 158 vehicles. Louisiana State Police said in a statement Monday that 25 people were injured and the number of fatalities may increase as first responders continue to clear the crash scenes and search for victims. The crashes turned Interstate 55 near New Orleans into an apocalyptic scene of mangled and scorched cars as people cried out for help. Gov. John Bel Edwards issued a call for blood donors and asked for prayers “for those hurt and killed.”