A major series of crashes involving an estimated 40-50 vehicles forced the closure of the Lake Pontchartrain Causeway Bridge in both directions early Tuesday morning (Dec. 17).

Officials attribute the chain-reaction collisions to dense fog that blanketed the area, drastically reducing visibility and creating treacherous driving conditions.

Emergency responders arrived on the scene shortly after the initial crash reports and remain actively involved in assisting those impacted.

According to EMS sources, multiple injuries have been reported, and several individuals have been transported to nearby hospitals for treatment.

The full extent of their injuries is still unknown.

One of the largest accidents occurred near mile marker 18, where at least 11 vehicles were involved.

Another significant crash further south included three vehicles.

Harrowing footage captured from the bridge shows vehicles severely mangled and piled together in a chaotic scene, underscoring the scale and devastation of the incident.

Authorities estimate that it could take several hours to clear the wreckage and reopen the bridge safely.

Crews are working diligently to remove damaged vehicles and debris, but officials anticipate the bridge will remain closed until at least this afternoon.

Motorists are being urged to avoid the Lake Pontchartrain Causeway Bridge and seek alternate routes for the remainder of the day. Law enforcement and emergency management officials continue to monitor the situation closely and are advising drivers to exercise extreme caution in foggy conditions.

Further updates on the cause of the crashes, traffic conditions, and the status of the injured are expected as the investigation progresses.