Student athletes are at risk for heat stroke, but these recommendations can save lives

A late-summer heat wave is creating dangerous conditions for student athletes across the country preparing for the fall season.

Among the most dangerous heat illnesses is exertional heat stroke, which is caused by vigorous exercise and hot, humid conditions. Unless treated right away, it can become fatal.

"(Exertional heat stroke) is one of the three leading causes of death in high school sport in America," Doug Casa, the CEO of the Korey Stringer Institute, told CBS News.