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Extreme danger: When the heat index is 125 degrees or higher, heat stroke is likely. Heat Index calculator. Here's a chart to help you find out what the heat index is. You can also use this heat ...
A given value of relative humidity causes larger increases in the heat index at higher temperatures. For example, at approximately 27 °C (81 °F), the heat index will agree with the actual temperature if the relative humidity is 45%, but at 43 °C (109 °F), any relative-humidity reading above 18% will make the heat index higher than 43 °C. [5]
The humidex (short for humidity index) is an index number used by Canadian meteorologists to describe how hot the weather feels to the average person, by combining the effect of heat and humidity. The term humidex was coined in 1965. [ 1 ]
A heat index of 103 or greater is considered dangerous, based on the National Weather Service heat index chart. The peak heat index forecast for the Rochester area will be 103 degrees on Wednesday ...
A wave of sweltering temperatures continues to swamp South Florida with heat index, or "feels like" temperatures, expected to reach 109 degrees in West Palm Beach today and continue with triple ...
Print/export Download as PDF; ... Heat_index calculates the heat index, ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; ...
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A heat advisory is a notice issued by the National Weather Service of the United States. Local offices often have their own criteria. Local offices often have their own criteria. High values of the heat index are caused by temperatures being significantly above normal and high humidities , and such high levels can pose a threat to human life ...