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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 Oct 3 8:00
Sapporo
14.3
Sendai
18.8
Tokyo
18.3
Niigata
19.4
Nagoya
16.9
Osaka
17.2
Hiroshima
14.8
Kochi
18.4
Fukuoka
17.8
Kagoshima
22.4
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.