CIMARRON, Kan. (WLS) --In the light of day, railroad officials were still investigating what caused a Chicago-bound Amtrak train with 145 on board to derail just outside Dodge City, Kansas, early Monday.
It was a few minutes after midnight when according to one government source, the engineer noticed a significant bend in the track. Rather than hit it, he pulled the emergency brake.
"I was still pretty awake. I was reading my book on my Kindle, and I was leaning back and all of a sudden we got some, like, turbulence, I suppose you would say and it became more drastic, and after like three seconds you knew something was wrong," said passenger Daniel Szczerba.
Seven of the train's cars flipped, posing a challenge to emergency responders who had to evacuate the passengers.
"We had to lift the patients up, set ladders up and bring them down on ladders," said Rex Beemer, emergency responder.
Two of the 32 injured were airlifted to Amarillo, Texas, in critical condition.
"I got outside and there was just a lot of people, a lot of people crying for help, looking for folks. It was a really dark field. So everyone was on both sides of the train looking for family members," said Szczerba.
The railroad tracks are owned by BNSF. A spokesperson said they are looked at twice a week and had passed the most recent inspection.
At least 32 people were hurt, two of them critically, authorities said.
Hours later, investigators said they were checking whether a vehicle crash may have damaged the track before the accident.
The train known as the Southwest Chief was apparently traveling at about 75 mph when the engineer noticed the deformity in the rail and pulled the brakes, a U.S. official told The Associated Press. The official spoke on the condition of anonymity because that person was not authorized to speak publicly about the federal investigation.
The train, which also had 14 crew members, was making a 43-hour journey from Los Angeles to Chicago when it derailed shortly after midnight along a straight stretch of tracks in flat farmland near Cimarron, a small community about 160 miles west of Wichita. Eight cars derailed, and four of them ended up on their sides.
Thirty-two people were taken to hospitals for treatment. Nearly all of them had been released by late morning, Amtrak said.
One crew member was treated at the scene.
The injured included two people who were airlifted to Amarillo, Texas, said Caytie Martin, a spokeswoman for the Northwest Texas Healthcare System. They were listed in critical condition.
Authorities were examining tire tracks leading to the rails. The damage did not appear to be intentional, Gray County sheriff's Deputy J.G. Sharp said.
Investigators from the National Transportation Safety Board were also at the scene.
Daniel Aiken, of Lenexa, Kansas, said he heard screaming as he climbed out of an overturned car. He stopped to smell a fluid that was flowing through the car, fearful that it was fuel, but was reassured when he realized it was water.
"Once people realized the train wasn't going to blow up, they calmed down," he said.
Timothy Davidson, from Nashville, Tennessee, said he and several other passengers heard what he called "a lot of clacking for about 20 minutes" before the accident.
"The train didn't sound right," he said.
Derek Kemp, who is moving back to Kansas City, Missouri, from California, said he was in a bathroom when he felt the train suddenly tilt, sending him face-first into the bathroom door and across a hallway into a baggage area.
Kemp, who has fire and rescue training, quickly scrambled to help women and children off the train.
Dave Gibbs, a Colorado man who was headed to Lawrence, Kansas, for a possible chef's job, said that the train "started rattling back and forth, and you could tell it was off the tracks."
That shaking lasted five to seven seconds, he said, before the train began tipping, then coming to an abrupt stop that sent a woman tumbling onto him.
"I was waiting for the worst. I was afraid I was going to die," recalled David Tisdale, who was New York-bound from his Arizona home.
Amtrak did not say how fast the train was traveling when it derailed, nor did it immediately respond to calls seeking further details. Visibility at the accident site was relatively clear at the time of the derailment.
Andy Williams, a spokesman for BNSF Railway, which owns the track, said the derailment was not caused by poorly maintained track. He said the track is inspected twice a week and meets Federal Railroad Administration guidelines.
Uninjured passengers were taken to the Cimarron community center to wait for Amtrak to make arrangements to transport them to their destinations.
Kelsey Wilson said she woke up when she felt the ride "getting really bumpy" and the train started to shake. Wilson, who was returning to Truman State University in Kirksville, Missouri, after spending spring break at home in Pueblo, Colorado, said her car disconnected from the one in front and that she hit her head as it overturned.
Wilson said she escaped through the top of the flipped car then slid down the side before she "passed out." She was taken to a hospital and released with a neck brace.
The future of the Southwest Chief service - the only Amtrak route through Kansas, with stops at six cities - had turned uncertain in recent years.
Amtrak warned it might stop or reroute the line because of disputes over who would pay to install safety technology designed to prevent traffic accidents caused by human error. The disagreement centered on lines used to route trains through the Kansas City area.
But officials last year announced a deal in the dispute, which also had threatened to halt Amtrak's River Runner service between Kansas City and St. Louis. Kansas and Colorado also moved in 2014 to secure a federal grant and allocate money for repairs on their sections of the Southwest Chief tracks.
The Associated Press contributed to this report.