It affects all people but particularly the very young and elderly. Profuse and prolonged sweating. Discourage any further exertion. Cool down casualty by sponging. Heat stroke is known as a Core Temperature Emergency.
Heat stroke can be fatal if left untreated.
The victim will have ceased sweating. Rapid, strong pulse. Move the victim into the shade. Remove victim's clothing Cool down the casualty. Prepared to resuscitate if required.