The 4-month-old infant, who died after she was exposed to extreme temperatures while aboard a boat with her family on Lake Havasu in Arizona last summer, died of complications of environmental heat exposure, PEOPLE confirms.
The Maricopa County Medical Examiner's Office confirmed in a statement to PEOPLE on Monday, March 5, that the baby died after losing consciousness at around 5 p.m. on Friday, July 5, 2024.
Tanna Rae's death was ruled an accident caused by exposure to elevated environmental temperatures, which were estimated to be 120 degrees, per the medical examiner's report. As a result of the environmental heat exposure, the baby suffered hemorrhagic shock, anoxic brain injury and dehydration.
Hemorrhagic shock is when "severe blood loss leads to inadequate oxygen delivery at the cellular level," per the New England Journal of Medicine. The anoxic brain injury caused a cerebral edema. This means that the infant's brain did not have oxygen, which then caused the brain to swell.
The dehydration caused low fluid intake and output, flattened fontanelles (a baby's skull soft spot), and a rapid drop in blood pressure that caused unconsciousness.
Before the Lake Havasu City Fire Department arrived at the scene, family members performed CPR on the infant, according to a GoFundMe page created for the Wroblewski family. First responders then transported Tanna to Havasu Regional Medical Center, per the MCSO statement.
A relative performed CPR on the infant for five minutes before first responders arrived, per the medical examiner. The first responders also performed CPR before she was airlifted to Phoenix Children's Hospital but was later pronounced dead.
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Tanna's mother, Alyssa, posted a heartfelt tribute to her late daughter on Sunday, July 7, via Facebook from an account that has since been disabled.
"Tanna Rae, our real life angel became an angel in heaven 💔😠. We are beyond devastated, heartbroken, there are just no words. July 5, 2024 our precious girl gave us her last smiles and we gave her our last kisses. Please visit us baby girl 🦋🪻," she wrote at the time.
"I will never understand why you had to leave us, you were just too perfect," she added. "I love you endlessly and I will look for you everywhere angel."
The family had visited Lake Havasu numerous times since April with Tanna, who was born in March 2024, as family Facebook posts previously showed.
Contributions to the family's GoFundMe reached $49,135 before the donation function was disabled.