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Other Images
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| OK Mesonet Current Solar Rad |
Safety and Preparedness
WetBulb Globe Temperature (WBGT)
What to do before (Preparedness):
- Bring plenty of water. Plan on taking frequent breaks in the shade
- Wear a hat, light weight, light fitting, light colored
clothes.
What to do during (Safety):
- Take breaks in the shade. Strenuous outdoor activities should be reduced,
especially in direct sunlight where there is little ventilation.
- Drink plenty of water or other non-alcohol fluids.
Your body needs water to keep cool. Drink plenty of fluids even
if you don’t feel thirsty.
- Don’t get too much sun. Sunburn makes the
job of heat dissipation that much more difficult
Threat levels and suggested work-load actions :
Level |
Affects |
Precautionary Actions |
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Working or exercising in direct sunlight will stress your body after 45 minutes. |
Take at least 15 minutes of breaks each hour if working or exercising in direct sunlight |
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Working or exercising in direct sunlight will stress your body after 30 minutes. |
Take at least 30 minutes of breaks each hour if working or exercising in direct sunlight |
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Working or exercising in direct sunlight will stress your body after 20 minutes. |
Take at least 40 minutes of breaks each hour if working or exercising in direct sunlight |
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Working or exercising in direct sunlight will stress your body after 15 minutes. |
Take at least 45 minutes of breaks each hour if working or exercising in direct sunlight |
Links |
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Email
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More WBGT Information
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WBGT Research Paper
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OSHA work load and WBGT Manual
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Legend and Definitions
The WBGT shown is the maximum WBGT for the 24 hour period. Usually it is highest during mid afternoon. The 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. If you work or exercise in direct sunlight, this is a good element to monitor. Military agencies, OSHA and many nations
in tropical or hot climate areas use the WBGT as a guide to managing work load in direct sunlight. |
