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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 May 27 17:00
Sapporo
17.8
Sendai
22.4
Tokyo
22.4
Niigata
19.8
Nagoya
22.1
Osaka
25.0
Hiroshima
23.3
Kochi
23.1
Fukuoka
21.4
Kagoshima
23.2
Naha
27.5

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.