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The climate crisis is shifting temperature averages and changing the definition of "extreme" heat. The National Weather Service is prototyping a heat risk warning scale that would communicate heat ...

INDIANAPOLIS (WISH) — The National Weather Service in Indianapolis generally defines a heat wave as a period of abnormally hot and humid weather lasting two or more days. However, some East Coast ...

The heat index measures how hot it really feels outside. The heat index is calculated based on air temperature and relative humidity. The National Weather Service will issue alerts when the heat index ...

Summer is the time for the most amount of outdoor fun! However, that fun can come at the price. Heat waves are the biggest weather killer in the United States. Between 1990 to 2019, an average of 138 ...