Heatstroke is collapse from being too hot for too long. Suffer heatstroke, treat heatstroke, at risk of heatstroke.
It is a medical emergency and not the same as heat exhaustion, since in heatstroke the body has stopped controlling its temperature at all and sweating may have ceased. Cooling must start before any ambulance arrives.
1nounheatstrokeCollapse from being too hot for too long.
“Drink plenty of water and stay in the shade, or you could get heatstroke.”
heatstroke is a condition.