Extreme heat environment is abominable environment

which is mainly involved with high air temperature and high humidity in some special places where people work.Heat stress is a description of extreme heat environment human body suffers.Research and evaluation to these kinds of extreme heat environments relate to labor safety and working reliability.In this study

the characteristics of Wet-Bulb Globe Temperature

Sreq

the physiologic index in ISO9886 standard and other two evaluation indices were described;the usage technique and the limitation of these indices were also analyzed and discussed.The results show that it is more practicable and important to evaluate the extreme heat environment with an integrated assessment approach considering human bodies' physiology response changes.