The NWS Web site features a handy on-line calculator for determining the heat index based on a combination of either temperature and relative humidity or temperature and dew point.

国家气象局(NWS)网站公布了一个方便的在线计算器便于大家基于温度和相对湿度或温度和露点的结合来计算炎热指数。

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The NWS cautions that its given heat index values assume shady, light wind conditions and that exposure to direct sunlight can increase the heat index by 15 degrees.

国家气象局(NWS)提醒道，它给出的炎热指数值并不可靠，微风条件和暴露于阳光直射下都能增加炎热指数15度。

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The bottom line is that the heat index is an extremely important measure for understanding heat and humidity's impact on the body.

基本的一点是，炎热指数是一个理解湿热对人体的影响的极为重要的度量方式。

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As of this afternoon, the heat index in Washington, DC, was 119 degrees Fahrenheit.

WHITEHOUSE: Energy and Environment Latest News | The White House

And it felt even hotter in some places, with the heat index topping out around 115 degrees.

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New York City and parts of northeast New Jersey are expecting the heat index to reach even higher.

CNN: Heat wave sweeps across U.S. Northeast