Prevention

Here are some ways to prevent Injury and illness due to extreme heat that are based on the WBGT.

Suggested Actions and Impact Prevention
Flag Color °F Affects Precautionary Actions
White < 80    
Green 80 - 85 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.
Yellow 85 - 87 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.
Red 88 - 90 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.
Black > 90 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.

Source: www.srh.noaa.gov/tsa