The boy was left in the car on the street outside the family home in Houston, Texas on Monday. The mother was in a hurry when she returned home with her son and her eight-year-old daughter. The son remained in the car as the mother and daughter got inside, County Sheriff Harris Ed Gonzalez told KTRK. Two or three hours later, the mother recalled that the child was still locked in his car seat, Gonzalez added. “This time the child did not succeed again with the activities for which they were preparing, it took some time for them to notice that the child was not at home,” he told KTRK. The sheriff added that the first correspondents found out the death of the child on the spot. It remains to be seen if the mother will face any charges. Houston hit record temperatures Monday with Houston Airport hobby reporting a temperature of 101 degrees Fahrenheit (38 degrees Celsius), according to CNN. The boy knew how to untie his seat, but researchers believe that since the car was rented, he was not familiar with it. “The door did not have any kind of child lock or anything like that,” Gonzalez said. Each year, an average of 38 children under the age of 15 die from heatstroke after living in a vehicle, according to the National Safety Council. A child’s body temperature also rises much faster than that of an adult and may begin to suffer from heatstroke when its temperature reaches 104 degrees (40 C). According to the National Highway Traffic Safety Administration (NHTSA), it can be fatal if the body reaches 107 degrees (42 C). Data collected by Jan Null, a lecturer in the Department of Meteorology and Climate Science at the University of San Jose, shows that most child deaths in hot cars occur because a caregiver forgets them in the vehicle. The data show that the issue can be a problem all year round and almost all US states have reported an incident since 1998. According to the NHTSA, a child should not be left alone in a car, even with the air conditioning on or the windows slightly lowered. The service also advises people to usually check both the front and rear seats of their vehicle before leaving and to place something in the back seat, such as a wallet, briefcase or other personal item, to ensure that the rear seat is checked.