[Risk factors of heatstroke].

In recent years, there has been an increased tendency for heatstroke to occur. A rise in mean temperature and the occurrence of extreme high temperatures and fine weather are environmental factors of risk. The prevalence of heatstroke characteristically increases before the passing of the rainy season, and approximately three times more men than women are susceptible. The age-specific distribution of heatstroke is bimodal and peaks at 10-20 and 50-60 years of age. For effective heatstroke prevention, however, many factors such as work environment and everyday life environment must be taken into account.