As with heat cramps, get the person to a cool place and loosen the victim's clothing. Give plenty of fluids to a heat exhaustion victim. Apply cool, wet compresses to cool the person. Heat stroke is the most severe heat condition. It develops when the body systems become overwhelmed by heat and begin to stop functioning.
Heat stroke is a serious medical emergency.
Work to cool the person, as in the other two heat-related illness, but also call for medical help. Refusing water, vomiting and changes in consciousness indicate the person's condition is worsening. Get medical attention immediately. If the person vomits, do not give any more fluids and put him on his side. This prevents the possibility of the person choking on his vomit.