Heat Illness Prevention Information

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Special Heat Stroke Alert ・ Heat Stroke Alert

Updated at May 15(Fri)5:00
Today[May 15]
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 May 15 7:00
Sapporo
12.1
Aomori
15.0
Akita
16.6
Morioka
14.1
Sendai
12.6
Yamagata
13.3
Fukushima
12.4
Mito
12.4
Utsunomiya
12.3
Maebashi
13.7
Kumagaya
13.8
Tokyo
14.2
Choshi
15.8
Yokohama
15.2
Nagano
14.8
Kofu
15.8
Shizuoka
18.1
Nagoya
19.5
Gifu
18.2
Tsu
17.7
Niigata
15.6
Toyama
16.6
Kanazawa
16.4
Fukui
16.9
Hikone
15.4
Kyoto
17.0
Osaka
15.6
Kobe
17.8
Nara
17.8
Wakayama
17.6
Okayama
16.7
Hiroshima
13.4
Matsue
15.3
Tottori
14.6
Shimonoseki
17.0
Tokushima
17.7
Takamatsu
18.6
Matsuyama
17.7
Kochi
18.1
Fukuoka
19.0
Oita
16.6
Nagasaki
16.8
Saga
17.6
Kumamoto
18.2
Miyazaki
17.8
Kagoshima
18.7
Naha
21.0
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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