It is never a good idea to leave a child alone in a parked car – especially in Arizona and especially during the summer months. A vehicle’s interior can heat up 20 degrees in 10 minutes. Even when the outside temperature is in the 60s, a parked vehicle can heat up above 110 degrees. Children are particularly vulnerable to heatstroke in hot cars because their body temperature can rise up to five times faster than an adults. In fact, heatstroke is the leading cause of non-collision fatalities for children 14 and younger even though most heatstroke deaths that occur in cars are 100% preventable