American football season is getting hotter. Young players are dying

Nearly a dozen US football players have died of heat in recent years as teams reckon with training in a changing climate

At the end of a pre-season football practice in late July, Myzelle Law, a 19-year-old defensive lineman for MidAmerica Nazarene University in Kansas, returned to the locker room, and began showing signs of seizure. It was hot outside, but Law's internal body temperature had reached 108F (42.2C), his family said. He died about a week later, of heat-related illness.

Last summer, the same thing happened to the 17-year-old lineman Phillip Laster Jr, a rising senior at Brandon high school in Mississippi. In 2021, 16-year-old Drake Geiger, a player for Omaha South high school in Nebraska, died after collapsing on a practice field.