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Special Heat Stroke Alert ・ Heat Stroke Alert

Updated at Apr 25(Thu)5:00
Today[Apr 25]
Map of Japan Alert Map(Today) Special Heat Stroke AlertsNot issued Heat Stroke AlertsNot issued WBGT forecast: 31+Not issued

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 Apr 25 8:00
Sapporo
12.2
Sendai
19.5
Tokyo
20.4
Niigata
12.4
Nagoya
18.0
Osaka
16.1
Hiroshima
12.3
Kochi
17.9
Fukuoka
16.9
Kagoshima
16.7
Naha
20.0
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.

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