Global:Safety resources - Heat guidelines: Difference between revisions
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Approved by the Board of Directors 18 November 2025 |
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#* Wet bulb globe temperature (WBGT) is a measure of the heat stress in direct sunlight, which takes into account: temperature, humidity, wind speed, sun angle and cloud cover (solar radiation). This differs from the heat index, which takes into consideration temperature and humidity and is calculated for shady areas. It is used by industrial hygienists, athletes, sporting events and the military to determine appropriate exposure levels to high temperatures. While there are mobile apps, a handheld device will provide much more accurate local data. | #* Wet bulb globe temperature (WBGT) is a measure of the heat stress in direct sunlight, which takes into account: temperature, humidity, wind speed, sun angle and cloud cover (solar radiation). This differs from the heat index, which takes into consideration temperature and humidity and is calculated for shady areas. It is used by industrial hygienists, athletes, sporting events and the military to determine appropriate exposure levels to high temperatures. While there are mobile apps, a handheld device will provide much more accurate local data. | ||
#* The [https://www.ready.marines.mil/Stay-Informed/Natural-Hazards/Extreme-Heat/Flag-Conditions/ flag system] is used by the US military and OSHA. It also provides work-rest cycles that can be adapted to provide adequate breaks between fights and rounds in addition to hydration. | #* The [https://www.ready.marines.mil/Stay-Informed/Natural-Hazards/Extreme-Heat/Flag-Conditions/ flag system] is used by the US military and OSHA. It also provides work-rest cycles that can be adapted to provide adequate breaks between fights and rounds in addition to hydration. | ||
# If the | # If the heat index reaches 103 degrees Fahrenheit (39.4 degrees Celsius), OR the WBGT reaches 90 (Black Flag), marshals must evaluate whether martial activities should continue or be postponed or canceled. If continued, marshals should also evaluate whether additional mitigation measures are needed. | ||
#During high heat, participants should act with caution and always in the interest of their own health. | #During high heat, participants should act with caution and always in the interest of their own health. | ||
#As always, local marshals are allowed to cancel official activities based on their reading of the environment. | #As always, local marshals are allowed to cancel official activities based on their reading of the environment. | ||
Latest revision as of 05:07, 21 November 2025
Heat guidelines
We strongly recommend that kingdoms develop heat conventions/policies for their environment and activities.
- Definitions/Measurement types
- Heat index is the measure of the temperature that a person feels, which is different from the actual air temperature, as it factors in humidity as well as air temperature. It might also be called the apparent temperature.
- Wet bulb globe temperature (WBGT) is a measure of the heat stress in direct sunlight, which takes into account: temperature, humidity, wind speed, sun angle and cloud cover (solar radiation). This differs from the heat index, which takes into consideration temperature and humidity and is calculated for shady areas. It is used by industrial hygienists, athletes, sporting events and the military to determine appropriate exposure levels to high temperatures. While there are mobile apps, a handheld device will provide much more accurate local data.
- The flag system is used by the US military and OSHA. It also provides work-rest cycles that can be adapted to provide adequate breaks between fights and rounds in addition to hydration.
- If the heat index reaches 103 degrees Fahrenheit (39.4 degrees Celsius), OR the WBGT reaches 90 (Black Flag), marshals must evaluate whether martial activities should continue or be postponed or canceled. If continued, marshals should also evaluate whether additional mitigation measures are needed.
- During high heat, participants should act with caution and always in the interest of their own health.
- As always, local marshals are allowed to cancel official activities based on their reading of the environment.
Helpful resources
The OSHA-NIOSH Heat Safety Tool App provides (note: this is only available in the USA):
- A visual indicator of the current heat index and associated risk levels specific to your current geographical location.
- Precautionary recommendations specific to heat index-associated risk levels.
- An interactive, hourly forecast of heat index values, risk levels, and recommendations for planning outdoor activities.
- Location, temperature, and humidity controls, which you can edit to calculate for different conditions.
- Signs and symptoms and first aid for heat-related illnesses.