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Heat Stress Index: WBGT

Current WBGT and Forecast

 

Select the location

 

(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

WBGT monitoring

As of Sep 21 9:00
Sapporo
21.2
Sendai
22.0
Tokyo
22.6
Niigata
21.0
Nagoya
23.8
Osaka
23.5
Hiroshima
21.5
Kochi
26.6
Fukuoka
25.5
Kagoshima
27.9
Naha
28.0

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.