At least two people are dead, with many more injured, after a pileup involving hundreds of vehicles on Interstate 55 in Louisiana early Monday, according to NOLA.com.

Heavy smoke from two marsh fires, coupled with a dense fog called “superfog,” descended on the New Orleans area during the morning commute, creating hazardous road conditions.

Numerous area schools closed due to the driving conditions, according to the report.

Visibility was near zero in some areas, according to WWL.

There were at least three pileups, on both sides of the interstate, about 10 miles north of LaPlace, La.

Traffic on I-55 was still closed as of 3 p.m. from south of Ponchatoula to Interstate 10 as crews continued to put out vehicle fires and remove damaged vehicles from the roadway.

Traffic on I-10 was closed in both directions between I-310 and U.S. 51, but reopened about 3 p.m.

Louisiana State Police said one vehicle had gone off the interstate and into the water, but the driver was rescued.

“We don’t know right now how many crashes were involved or how many vehicles were involved,” said Louisiana State Police spokesperson Kate Stegall during a midday press conference.

Survivors told media it was the worst crash they had seen and they felt lucky to be alive.

“It was ‘Boom. Boom.’ All you kept hearing was crashing for at least 30 minutes,” Clarencia Reed told NOLA.com.

“I’ve never seen anything like this before. It was horrible. It was the worst wreck I’ve ever seen,” Christopher Coll of Destrehan, La., told the outlet.