Deborah Severio Killed in Chain-Reaction Multi-Vehicle Crash on Interstate 10 in St. Tammany Parish, Louisiana

 In St. Tammany Parish, Louisiana, authorities are investigating a tragic chain-reaction crash on Interstate 10 that left 63-year-old Deborah H. Severio of Ponchatoula dead in the early morning hours of May 22, 2026. The multi-vehicle incident unfolded near the busy Interstate 10, Interstate 12, and Interstate 59 interchange, an area known for heavy early commuter traffic and complex roadway conditions.

According to Louisiana State Police Troop L, the crash began when a Toyota 4Runner became disabled in the roadway, creating an unexpected hazard for approaching drivers. Deborah Severio, driving a Toyota RAV4 eastbound on Interstate 10, slowed as she approached the scene, but her vehicle was then struck from behind by an Audi A6, triggering a chain of events that escalated within seconds.

Investigators said that after the initial collisions, drivers exited their vehicles and stood near the crash area while awaiting emergency responders. At that point, Severio was positioned between her Toyota RAV4 and the Audi A6 when a Nissan Titan approached the scene and struck the rear of the Audi, setting off another violent impact in the active crash zone.

The force of the secondary collision caused the Audi to lurch forward, striking both Severio and her vehicle. Authorities confirmed that she suffered fatal injuries at the scene and was pronounced dead despite rapid emergency response efforts. A passenger in her vehicle sustained minor injuries and was transported to a nearby hospital for treatment.

Officials stated that the drivers of the Toyota 4Runner and the Nissan Titan were properly restrained and were not injured in the sequence of crashes. Investigators also confirmed that impairment is not suspected in the Nissan Titan driver, who provided a breath sample showing a blood alcohol concentration of 0.000 g%, according to preliminary findings released by authorities.

Louisiana State Police emphasized that multiple crashes occurred in the same general area during the same timeframe, creating a dangerous and rapidly evolving situation on the interstate. Troopers continue to examine roadway conditions, driver reactions, visibility factors, and traffic flow patterns to determine how the sequence of events escalated so quickly.

Routine toxicology samples have been collected from all drivers involved as part of the ongoing investigation. Officials have not yet determined all contributing factors but are reviewing evidence carefully to reconstruct each moment leading up to the fatal impact and the positioning of vehicles and individuals at the crash scene.

As the investigation continues, Louisiana State Police are urging motorists to exercise extreme caution near crash scenes and disabled vehicles, emphasizing the importance of moving vehicles out of travel lanes when possible and avoiding standing near active roadways. The death of Deborah Severio has left family, friends, and the Ponchatoula community mourning a sudden and heartbreaking loss tied to a fast-moving interstate incident that unfolded in seconds.