, also called "sunstroke," occurs when the victim's temperature control system, which produces perspiration to cool the body, stops working. The skin is flushed, hot and dry, and body temperature may be elevated. In fact, body temperature can rise so high that brain damage and death may result if the body is not cooled quickly. The victim may also be confused, develop seizures, breathe shallowly, and have a weak, rapid pulse.
Heat stroke is the most serious heat-related illness and people exhibiting its symptoms should seek emergency medical attention. Heat stroke usually occurs when the heat index is 130 degrees or higher, but can occur when the heat index surpasses 105 degrees.""