Interactive: Heat index calculator
Heat Index calculator
Enter any temperature 80-112° Fahrenheit along with a relative humidity that is greater than 13. Calculate to see how the temperature feels to your body. Heat index values are for shady locations. If exposed to direct sunlight, the heat index value can be increased by up to 15°F.
As featured on
Thousands died last year from heat-related illnesses. Here’s how a landmark rule would protect the rights of employees.
The Earth recently reached the hottest day ever measured. And in the absence of federal heat rules for workers, some employers are taking it upon themselves to protect employees.
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