Heat Stress Index: WBGT
Current WBGT and Forecast
| Hokkaido | Tohoku | Kanto | Koshin |
| Tokai | Hokuriku | Kinki | Chugoku |
| Shikoku | Kyushu | Okinawa |
| (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 1 14:00
Sapporo
14.5
Sendai
15.4
Tokyo
19.3
Niigata
17.2
Nagoya
19.2
Osaka
18.6
Hiroshima
16.8
Kochi
19.8
Fukuoka
20.7
Kagoshima
19.8
Naha
24.8
Aomori
16.0
Akita
18.0
Morioka
17.2
Yamagata
20.2
Fukushima
18.2
Mito
21.3
Utsunomiya
18.0
Maebashi
20.2
Kumagaya
20.0
Choshi
18.8
Yokohama
19.3
Nagano
18.7
Kofu
18.2
Shizuoka
19.5
Gifu
19.8
Tsu
19.9
Toyama
18.7
Kanazawa
18.5
Fukui
17.7
Hikone
19.4
Kyoto
19.5
Kobe
16.9
Nara
20.5
Wakayama
19.9
Okayama
20.3
Matsue
20.6
Tottori
17.3
Shimonoseki
19.1
Tokushima
19.3
Takamatsu
20.2
Matsuyama
19.7
Oita
20.6
Nagasaki
18.3
Saga
18.5
Kumamoto
18.8
Miyazaki
19.3
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.
