An Excessive Heat Warning is issued by the National Weather Service of the United States within 12 hours of the heat index reaching one of two criteria levels. A warning will be issued if there is a heat index of at least 105°F for more than 3 hours per day for 2 consecutive days, or if the heat index is greater than 115°F for any period of time. 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, Heat exhaustion, and other heat-related illnesses.
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Famous quotes containing the words excessive, heat and/or warning:
“Your true traveller finds boredom rather agreeable than painful. It is the symbol of his liberty—his excessive freedom. He accepts his boredom, when it comes, not merely philosophically, but almost with pleasure.”
—Aldous Huxley (1894–1963)
“Beware thoughts that come in the night. They aren’t turned properly; they come in askew, free of sense and restriction, deriving from the most remote of sources.”
—William Least Heat Moon [William Trogdon] (b. 1939)
“An overturned cart is a warning to oncoming drivers.”
—Chinese proverb.