Have you heard of the Wet Bulb Globe Temperature (WBGT) Index? This index assesses factors of heat that can lead to heatstroke and other heat disorders. Therefore it is used for heatstroke prevention.
Do refer to the guidelines derived from the WBGT index before you participate in any activities!


Learn more about the WBGT Index here (English): https://www.otsuka.co.jp/en/health-and-illness/heat-disorders/wbgt/