heat exhaustion
heat prostration

"I have a man here suffering from heat prostration, according to the diagnostic program."

Don't let anyone go off duty unless they've collapsed with heat prostration.

He added something else: 17 people had died of heat prostration the day before.

I can't have my wife dying on me from heat prostration.

I should hate to lose you to a case of heat prostration.

"Define 'better' when your work rules will result in people dropping from heat prostration."

Or maybe they died of heat prostration: too much volume, not enough surface.

The passengers and crew suffered massive heat prostration but all will live.

A half-dozen players have suffered heat prostration over the last two days.

And if the power stays off long enough, there'll be cases of heat prostration.