Heat Illness Prevention Information

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Special Heat Stroke Alert ・ Heat Stroke Alert

Updated at May 12(Mon)17:00
Today[May 13]
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 12 23:00
Sapporo
10.7
Aomori
9.2
Akita
12.6
Morioka
12.2
Sendai
12.3
Yamagata
11.8
Fukushima
12.1
Mito
13.4
Utsunomiya
14.5
Maebashi
14.6
Kumagaya
15.6
Tokyo
14.4
Choshi
15.0
Yokohama
16.0
Nagano
10.6
Kofu
15.2
Shizuoka
16.2
Nagoya
13.3
Gifu
12.4
Tsu
14.2
Niigata
13.8
Toyama
13.2
Kanazawa
13.2
Fukui
12.5
Hikone
12.7
Kyoto
13.5
Osaka
15.8
Kobe
15.1
Nara
13.6
Wakayama
14.9
Okayama
12.0
Hiroshima
11.3
Matsue
11.7
Tottori
11.6
Shimonoseki
12.9
Tokushima
15.8
Takamatsu
14.1
Matsuyama
12.2
Kochi
14.3
Fukuoka
13.9
Oita
13.9
Nagasaki
13.6
Saga
13.1
Kumamoto
13.4
Miyazaki
15.1
Kagoshima
14.8
Naha
18.2
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.

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