Special Heat Stroke Alert ・ Heat Stroke Alert

Updated at Nov 9（Sat）17:00

Today［Nov 9］

Today［Nov 9］

Tomorrow［Nov 10］

Tomorrow［Nov 10］

This year's Heat Stroke Alert operation
stopped on Oct. 23, 2024.

Heat Stress Index: WBGT

Provision of information on Heat Stress Index (WBGT) will start on Apr 24, 2024.

(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.

Contents

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