Heat Stress Index: WBGT

Provision of information on Heat Stress Index (WBGT) ended on October 25, 2023.

(Blue) Almost safe	(Sky) Caution	(Yellow) Warning	(Orange) Severe Warning	(Red) Danger
< 21 appropriate water replenishment suggested	21 - 25 water should be replenished often	25 - 28 rests should be provided often	28 - 31 heavy exercise prohibited	≥ 31 exercise prohibited

Note

WBGT index is one of the empirical indices representing the heat stress to which an individual is exposed. (ISO7243)
WBGT varies depending on environmental situation and condition.

Heat Stroke Alert

  For Oct 25 (Updated at Oct 25 5:00)

This year's Heat Stroke Alert operation
ended on October 25, 2023.

Contents

• WBGT Guideline
• All about WBGT
• Heat illness prevention/countermeasures
• Materials
• Terms of Use