This condition warrants a 911 call for an ambulance. The warning signs of heat stroke, which can vary, include the following, according to the Centers for Disease Control & Prevention (CDC): • An extremely high body temperature (above 103°F) • Red, hot, and dry skin (no sweating) • Rapid, strong pulse • Throbbing headache • Dizziness • Nausea. Recommended interventions: Signs of severe heat stress may signal a life-threatening emergency, the CDC warns. "Have someone call for immediate medical assistance while you begin cooling the affected person." Perform the following actions, quoted directly from the CDC: • Get the person to a shady area. • Cool the person rapidly, using whatever methods you can. For example, immerse the person in a tub of cool water; place the person in a cool shower; spray the person with cool water from a garden hose; sponge the person with cool water; or if the humidity is low, wrap the person in a cool, wet sheet and fan him or her vigorously. • Monitor body temperature and continue cooling efforts until the body temperature drops to 101°-102°F. • If emergency medical personnel are delayed, call the hospital emergency room for further instructions. • Get medical assistance as soon as possible.