Table 2.

Heat stroke risk coefficient.

Risk State	Risk Coefficient	Heat Stroke Precaution
Safe	≤29	Normal activity is OK.
Attention	30–34	Normal activity is OK, but need to drink water frequently.
Waring	35–37	Avoid the high intensive work, and need to drink water frequently.
Dangerous	≥38	Avoid the outdoor activity, and force to drink water.