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On Monday, participants were under medical supervision as they sat inside a non-running vehicle in order to simulate a forgotten child or pet.
While in the vehicle, the men and women took to social media to live stream their experience, answering questions from the public.
The participants were keeping track of the temperatures they were enduring. In less than 10 minutes, the car reached 120 degrees Fahrenheit.
According to the National Safety Council, 949 children have died across the United States due to pediatric vehicular heatstroke since 1998, in which each of these deaths could have been prevented.
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Watch the raw video of first responders who were put to test in the hot car demonstration.
Raw video: First-responders put to test in hot car simulation
SEE ALSO: Mom may have left 5-year-old son in vehicle for 2-3 hours, sheriff says
Harris Co. hot car death: Mom may have left 5-year-old son in vehicle for 2-3 hours, sheriff says