(CNN) A 12-year-old girl called police after her mother passed out from a heroin overdose on the side of the highway in Volusia County, Florida, on Thursday night.

The woman's daughter called 911 from the family's minivan that was parked on the side of I-4 after the mother, Tiffany Smith, pulled over and lost consciousness, the Volusia County Sheriff's Office said in a press release on its website.

"Um, my mom won't wake up and we're on I-4 in the car," the daughter says in a panicked voice on a 911 call released by the agency.

Police respond to a child's 911 call after her mother passed out from a heroin overdose.

When deputies arrived, they found Smith unconscious with her 12-year-old daughter, a 7-year-old boy, a 1-year-old boy and two dogs in the minivan.

Paramedics administered a dose of Narcan to revive her, police said. Afterward, she can be heard on body camera footage telling deputies she was on a five-hour trip to her sister's in South Carolina with the children when she began to experience back pain.

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