At least two people were killed and 30 injured in a series of car crashes on Interstate 55 in Louisiana due to dense fog known as "super fog." The pileup occurred on Monday, October 23, between Ruddock and Manchac. The accidents involved multiple vehicles, including three 18-wheel trucks that collided and caught fire. One vehicle was even pushed over the railing of the interstate. The area was left completely gridlocked, hindering rescue efforts. Reports indicate that the super fog was caused by the combination of fog and smoke from nearby fires. Visibility levels dropped below a quarter mile, with some moments of near-zero visibility throughout the morning. The National Weather Service defines "super fog" as a thick fog that can reduce visibility to less than 10 feet in damp, smoky conditions. The state of Louisiana has been dealing with unprecedented wildfires, extreme heat, and drought, which may have contributed to the dense fog. Motorists are advised to exercise caution and use headlights on low beams when driving in foggy conditions. Additionally, it is recommended to delay travel plans or consider alternate routes with less dense fog.