Extreme heat can be deadly — heat waves have some of the highest mortality rates of all weather phenomenon. According to the CDC, between 1979 and 1999 there were 8,015 heat-related deaths in the United States alone. In 2003 a heat wave in Europe killed over 50,000 people. With the number of heat advisories growing each year, this essential guide is a must-have for outdoorsmen and home owners alike.