The United States is in the grip of a record hot summer, and children who play outdoors sports are vulnerable to heat stroke.
Earlier this month two assistant football coaches were arrested and charged with reckless endangerment after a student athlete collapsed during training. The student had been doing weight training and running in 93-degree weather, according to reports.
Police say the coaches failed to provide the players with water.
The danger is very real. Exertional heat stroke is one of the leading causes of sudden death in sports.