[The epidemiology of heat disorders].
ABSTRACT Recently, the number of deaths from heat stroke has been increasing. On the whole, such deaths are more prevalent among males in the age groups of 0 to 4, 15 to 19, 50 to 54, and 80. Such deaths are rare among young females, but its number gradually increases with aging, and peaks in the age group of 80 to 84. Recently, the proportion of people aged 65 or above has significantly increased among those who die from heat stroke. Heat disorders are frequently induced by outdoor sports, such as baseball, mountain-climbing, and long-distance running competitions, although it has reportedly occurred also during indoor sports as well.