Heat Stress Index: WBGT
(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 Jun 1 21:00
Sapporo
13.3
Sendai
17.7
Tokyo
19.8
Niigata
17.4
Nagoya
20.0
Osaka
20.6
Hiroshima
18.5
Kochi
19.1
Fukuoka
22.5
Kagoshima
21.8
Naha
25.2
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.
Heat Stroke Alert
For Jun 2
(Updated at Jun 1 17:00)


