Heat exhaustion can occur at temperatures above 90 degrees and heat stroke can occur when temperatures rise above 105 degrees. If not treated immediately, heat exhaustion can lead to heat stroke. In heat stroke, a child can no longer sweat. His body temperature rises to deadly levels leading to severe damage to the brain, liver and kidneys, or even death. It's not rocket science.
Closed cars get very hot, very quickly.
That intense heat kills children. Experts say that if you see a young child in a car unattended you should try to find the parents immediately or call police or security officers for help. Taking action immediately could save a child from serious harm, or even death.