Heat exhaustion starts slowly, but if it's not quickly treated it can progress to heatstroke. In heatstroke, a person's temperature reaches 105°F (40.5°C) or higher. Heatstroke requires immediate emergency medical care and can be life-threatening.
If your child has symptoms of heatstroke, get emergency medical care immediately.
For cases of heat exhaustion or while awaiting help for a child with possible heatstroke: