Heat Illness Prevention Information: Current WBGT and Forecast

(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 11 4:00

Sapporo

10.4

Aomori

8.2

Akita

6.2

Morioka

4.0

Sendai

8.8

Yamagata

6.6

Fukushima

9.4

Mito

11.2

Utsunomiya

12.9

Maebashi

11.1

Kumagaya

11.9

Tokyo

15.0

Choshi

15.4

Yokohama

16.0

Nagano

7.1

Kofu

9.2

Shizuoka

13.5

Nagoya

12.7

Gifu

11.5

Tsu

11.7

Niigata

9.4

Toyama

11.3

Kanazawa

9.2

Fukui

10.0

Hikone

9.5

Kyoto

9.9

Osaka

12.0

Kobe

11.8

Nara

9.4

Wakayama

10.8

Okayama

10.0

Hiroshima

10.2

Matsue

9.6

Tottori

10.2

Shimonoseki

14.1

Tokushima

11.7

Takamatsu

11.3

Matsuyama

11.8

Kochi

13.2

Fukuoka

12.6

Oita

11.7

Nagasaki

12.8

Saga

11.6

Kumamoto

12.1

Miyazaki

12.4

Kagoshima

14.1

Naha

21.4

Daily Maximum WBGT and Forecast

	05/11	05/12	05/13	05/11 06	05/11 09	05/11 12	05/11 15	05/11 18	05/11 21	05/11 24	05/12 03	05/12 06	05/12 09	05/12 12	05/12 15	05/12 18	05/12 21	05/12 24	05/13 03	05/13 06	05/13 09	05/13 12	05/13 15	05/13 18	05/13 21	05/13 24
Sapporo	15	21	19	12	15	14	14	13	12	12	10	11	17	20	21	17	14	12	11	13	19	17	17	14	12	12
Kushiro	12	15	17	7	12	11	12	8	8	7	6	8	12	14	15	12	9	8	8	10	14	17	13	12	11	8
Aomori	18	20	21	11	15	18	17	15	13	12	9	13	19	19	20	17	15	13	10	12	15	19	21	17	13	10
Sendai	21	22	20	11	19	21	21	17	16	16	14	14	17	22	20	16	15	16	15	15	19	19	20	16	16	16
Tokyo	22	22	20	16	21	22	20	17	17	17	16	17	21	22	21	17	15	15	15	15	18	19	20	17	15	15
Nagano	19	22	20	9	15	18	19	15	13	12	11	11	16	22	20	16	15	15	14	14	17	20	16	15	14	12
Nagoya	22	23	21	14	20	21	22	19	17	17	15	16	20	23	22	18	16	15	15	16	18	20	21	16	16	16
Niigata	22	22	20	11	22	21	18	15	14	13	12	13	20	22	19	16	15	14	14	14	19	20	19	16	14	14
Kanazawa	22	22	20	10	17	22	21	18	17	14	13	14	22	22	21	18	16	15	15	16	20	20	19	18	16	15
Osaka	21	23	20	13	17	20	21	19	19	18	17	16	21	22	23	19	17	17	16	16	20	20	19	17	18	19
Hiroshima	21	22	20	12	18	21	20	19	18	17	16	15	18	22	21	19	19	18	17	16	19	20	19	19	20	18
Matsue	22	23	24	11	20	22	20	17	15	14	14	13	18	23	21	17	16	16	15	15	20	24	22	18	17	16
Kochi	22	24	22	14	19	22	20	17	16	16	14	15	20	24	22	20	18	17	15	15	19	22	21	19	19	17
Fukuoka	25	24	23	13	19	25	23	20	17	16	15	15	21	24	23	20	17	18	18	18	22	22	23	21	20	19
Kagoshima	23	25	22	15	18	20	23	19	17	16	15	16	20	24	25	21	20	19	18	18	21	21	21	22	20	20
Naze	23	25	26	19	23	22	21	20	20	20	20	21	22	23	25	22	20	20	19	19	24	26	22	20	19	18
Naha	25	24	26	22	23	25	25	22	22	22	21	22	22	24	23	22	21	22	22	22	25	26	24	22	21	21
Ishigakijima	28	26	26	24	26	28	27	24	23	24	23	23	24	26	26	24	23	23	22	23	25	26	25	24	23	23

Note

WBGT index is one of the empirical indices representing the heat stress to which an individual is exposed. (ISO7243)

Heat Stress Index: WBGT

Current WBGT and Forecast

WBGT monitoring

Daily Maximum WBGT and Forecast

Note