Are your boys regularly out in this kind of heat playing? If so, they should be fine. However, many kids of this generation are not used to being out in extreme heat and cannot take it. I grew up here and GA, I know heat, but I would make darn sure my kids knew to stay hydrated and call me if they started feeling funny. We were at Disney last summer when the temps were over 100 with heat index over 110-it is very difficult to stay hydrated.