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  Heat Stroke Alerts have been issued.   [Map View]

Heat Stress Index: WBGT

Current WBGT and Forecast

 

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(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 Aug 13 5:00
Sapporo
19.6
Sendai
24.5
Tokyo
24.2
Niigata
25.7
Nagoya
24.4
Osaka
25.2
Hiroshima
25.9
Kochi
25.2
Fukuoka
26.3
Kagoshima
25.9
Naha
27.0

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.