Authorities were called around 3:45 p.m. when the child was found inside a vehicle on Kathleen Crescent in Coram.
Apparently the girl's mother and her three children were out running errands before they got home and went inside, police said. It is unclear how much time passed before the mother realized the 11-year-old wasn't inside and was still in the car with the windows up.
RELATED: Deputy saves 3-year-old left in hot car for 12 hours
The child's mother called 911 when she realized what had happened.
Police said the mother was instructed to bring the child into the house and perform CPR. Responding officers assisted her until the girl was transported to Stony Brook Hospital where she later died.
The emotional scene brought veteran officers to tears. Neighbors of the little girl are devastated and demanded answers about how this could happen.
RELATED: Baby in hot car rescued, woman who called 911 thanked
"It's an 11-year-old girl, it's a baby," neighbor Tommy Score said. "She had the rest of her life ahead of her, that family has the rest of their lives ahead of them without her."
"She was a sweet little girl. Our kids played together. A loving, wonderful kid," said next door neighbor Scott Krusen.
The temperature was in the 90s outside when the young girl was found inside the stifling car.
Heartbreaking story of 11 year old Coram girl found in a hot car today. Blistering heat builds so fast inside a car on a day like this. So dangerous. Please be aware. #abc7ny pic.twitter.com/l3PFhfZfBR— Lee Goldberg (@LeeGoldbergABC7) August 28, 2018
Crime scene investigators arrived to the scene to gather evidence, but it is still too early to determine if any charges will be filed.
It's not clear if the victim had special needs which kept her from getting out of the car and saving her own life. Neighbors did not want to speak about that out of respect to the family.