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A definition based on the Heat Wave Duration Index is that a heat wave occurs when the daily maximum temperature of more than five consecutive days exceeds the average maximum temperature by 5 °C (9 °F), the normal period being 1961–1990. [9] The same definition is used by the World Meteorological Organization. [10]
The summer heat wave resulted in Texas experiencing its second hottest summer on record in 2023, with the full year being its hottest on record. Over 300 people died from heat in Texas in 2023, the most since the state began tracking such deaths in 1989.
Stifling heat blanketed tens of millions of people in United States on Tuesday, forcing people and even zoo animals to find ways to cool down as summer arrives in what promises to be a sweltering ...
An excessive heat warning is a notice issued by the National Weather Service of the United States within 12 hours of the heat index reaching one of two criteria levels. In most areas, a warning will be issued if there is a heat index of at least 105 °F (41 °C) for more than three hours per day for two consecutive days, or if the heat index is greater than 115 °F (46 °C) for any period of time.
Baltimore and Philadelphia are forecast to touch records near 100 degrees Fahrenheit (38 degrees Celsius) on Sunday, while temperatures rise into the 90s F in states like Idaho, Montana and ...
“While this is a heat wave and we urge everyone to be cautious, we typically don’t see large attendance at our cooling centers unless there are power outages,” city spokesperson Mackenzie Covert said. “Our community is hot every summer. Our residents are kind of aware of it. They all tend to have working air conditioners.”
A brutal heat wave scorched a large swath of the U.S. on Wednesday, with millions from the Midwest to the Northeast enduring sweltering temperatures during the Juneteenth holiday.. Cities across ...
The National Weather Service said the dangerous heat wave was expected to make its way across the country and into Maine until at least Friday. An organization that provides produce to areas with limited access to fresh foods in Columbus, Ohio, prepared frozen towels for their workers in case of overheating and packed cold water to stay hydrated.