Roanoke, VA - Heat like we've seen in June can turn deadly.
So far this season, 11 children have died from heatstroke in hot cars across the nation.
Safe Kids Southwest Virginia says cracking the window does not help.
Heatstroke sets in when the body isn't able to cool itself quickly enough.
A child's body heats up three to five times faster than an adult.
When the child's internal temperature reaches 104 degrees, their major organs begin to shut down.
When it's 107 degrees - the child can die.
In the last 16 years more than 600 children have died in cars from heatstroke and the average in the US is 38 deaths per year.
Safe Kids says to create reminders by putting something in the back of your car such as a briefcase that you will need.
And also take action - if you see a child alone in a car - call 911.