"Unraveling the Deadly 'Superfog' Behind Louisiana's Massive Pileup"

A massive vehicle pileup in Louisiana, which resulted in seven deaths and multiple injuries, was caused by a dangerously thick "superfog" exacerbated by nearby wildfires. Superfog occurs when moisture in the air mixes with smoke from burning brush and trees in marshlands, reducing visibility to less than 10 feet. The low-visibility conditions were worsened by calm winds and humidity in the area. Marsh fires, fueled by extreme drought conditions, have been more frequent in Louisiana, increasing the chances of developing superfog.