環境省 環境省熱中症予防情報サイト スマートフォンはこちら japanese 環境省 環境省熱中症予防情報サイト スマートフォンはこちら japanese


  1. Home
  2.  >
  3. All about WBGT (Wet Bulb Globe Temperature)

All about Wet Bulb Globe Temperature

All about Wet Bulb Globe Temperature #1

What is Wet Bulb Globe Temperature?

Wet Bulb Globe Temperature (WBGT) is an environmental index representing
temperature, humidity and radiation*1
as major factors affecting human heat balance*2.
It has been specified as a heat illness risk on the Japanese Ministry of the Environment’s heat illness prevention website since 2006.
WBGT is calculated from dry bulb temperature, wet bulb temperature and globe temperature.

Details about WBGT observations (in Japanese).

*1    Radiation heat comes from the ground, buildings, people and other sources. Hotter bodies emit larger amounts.

*2    Wind also affects human heat balance.

All about Wet Bulb Globe Temperature #2 All about Wet Bulb Globe Temperature #3

Find out more about WBGT.

How much do you know about WBGT?
Check out your local WBGT.

All about Wet Bulb Globe Temperature #4

Preventing heat illness

All about Wet Bulb Globe Temperature #5

Heat illness symptoms:

All about Wet Bulb Globe Temperature #6

First Aid in heat illness (in Japanese).

All about Wet Bulb Globe Temperature #7