Heat Stress Index: WBGT

Current WBGT and Forecast

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.