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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. 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 through conditions such as heat stroke.
The heat began to shift south over the coming days. On June 22, Washington DC crossed the century mark for the first time since 2016, ending the fifth longest streak on record for the city. [15] On July 5, Palm Springs, California reached 124 °F (51 °C), breaking the record for the city's highest temperature. [16]
An excessive heat watch is a notice issued by the National Weather Service of the United States when the high temperatures reach anywhere within the range of 95 °F (35 °C) and 100 °F (38 °C) in the continental US.
Some 80 million people are currently under a heat advisory or warning as heat is expected to surpass 90 degrees Fahrenheit (32.2 degrees Celsius) and flirt with 100 degrees in some areas, which is ...
The hottest day of the heat wave is expected today with heat indices climbing to 105 to 110 degrees. An Excessive Heat Warning is in effect for all of northern IL, while a heat advisory is in ...
The National Weather Service Boston issues a heat advisory when the heat index value is expect to exceed 97. An excessive heat watch is issued when a heat index value up to 105 degrees is possible.
See Severe weather terminology (United States) and/or Severe weather terminology (Canada) for comprehensive articles concerning specific nations' warnings, watches, advisories and related terms. Pages in category "Weather warnings and advisories"
The National Weather Service issued a heat advisory for South Puget Sound and several other parts of Washington that will be in effect from 8 a.m. Thursday, Sept. 5, through 11 p.m. Friday, Sept. 6.