Preliminary information about a fatal 36-vehicle pileup along Interstate 25 near Pueblo reveals a domino effect happened after an SUV and a pickup truck hauling a trailer collided.

The massive wreck killed five people and injured 29 others.

After a dust storm swept through the area on the morning of Feb. 17, vehicles were driving in “brown-out” conditions, the Colorado State Patrol stated in a previous news release. An update with preliminary findings shows that a 2016 Ford Escape was heading northbound on I-25 when it rear-ended a 2011 GMC Sierra hauling a trailer.

The Sierra’s estimated speed was about 15-20 mph in a 75 mph zone, the State Patrol said in the update, released Friday. After the collision, the Ford Escape spun out and came to a stop along the road.

That is when a domino effect happened.

A tractor-trailer, a 2004 Kenworth W900, slowed down due to the storm and crash when a truck hauling a trailer sideswiped it, causing the trailer to detach. The truck continued northbound and then struck another vehicle.

With enough blockage along the road, a “series of collisions” involving several cars, many of which included other big rigs and trucks, occurred, the State Patrol said.

The State Patrol is still investigating what happened to more than a dozen other cars as the event played out.

High winds, which reached 81 mph at the Colorado Springs Airport, were a major factor in the crash, officials previously said. Wind speeds reached 71 mph in Pueblo and hit more than 60 mph along the Eastern Plains and the San Luis Valley, according to the National Weather Service in Pueblo.

Of those injured, seven sustained serious injuries, according to the State Patrol. Another person, 65-year-old Thomas Thayer, was airlifted to a hospital, where he died. The remaining 21 were treated for moderate to minor injuries.

The Pueblo County Coroner’s Office released the identities of the deceased a day after the crash. Everyone killed lived in Colorado.

Thayer and his wife, Mary Sue, 72, were from Rye; David Kirscht, 90, and his son, Scott, 64, were from Walsenburg; and Karen Ann Marsh, 66, was from Pueblo, the Coroner’s Office said.