Toddler Survives Car Crash, Hangs Upside Down in Car Seat for 14 Hours in Freezing Temperatures [VIDEO]

An 18-month-old girl whose mother crashed their car into a Utah river survived hanging upside down in a car seat for some 14 hours in freezing temperatures before a fisherman found her, according to reports.

Rescuers found the toddler, Lily, on Saturday hanging upside down in her mother's car that flipped into a frigid Utah river the night before.

The mother, 25-year-old Lynn Groesbeck of Springville, was found dead in the car, and her daughter Lily Groesbeck was in critical but stable condition at a Salt Lake City hospital, police said Sunday.

"She is doing remarkably well considering the circumstance. The doctors have been hopeful so far," the mother's sister, Jill Sanderson, told KSL-TV of Salt Lake City on Sunday. "We would like to express our appreciation to the Spanish Fork rescue team for saving the baby's life."

A group of fishermen discovered the wreck and called first aid responders. They then heard a

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'mysterious voice' calling for help and they raced in to search for survivors in the car.

"We could see a person in the front seat and then we heard a voice saying, 'Help me, we're in here.' It was clear as day," said Officer Tyler Beddoes of the Spanish Fork Police Department, according to the New York Daily News.

"I don't know what I thought I heard," Beddoes said. "I'm not a typically religious guy. It's hard to explain - it was definitely something. Where and why it came from, I'm not sure."

The family has set up a GoFundMe account to raise money for the mother's funeral expenses and care for the child.