In 2021, the NFHS Foundation announced a grant program to distribute 5,000 wet bulb globe thermometers to high schools across the country. The $1.5 million program will provide schools with an important tool for minimizing heat-related illness during outdoor activities.  Wet bulb globe thermometers measure the heat stress in direct sunlight, accounting for temperature, humidity, wind speed, sun angle and cloud cover. High schools can use the thermometer’s reading to help determine if the weather is appropriate to hold outdoor activities


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