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A heat wave or heatwave, sometimes described as extreme heat, is a period of abnormally hot weather. [ 1 ] : 2911 A time period of five consecutive days is often used to define a heat wave but the exact definition of a heat waves can vary for different countries.
June 29, 2017, Greece heat wave - hot air mass from Sahara Desert extended to the Balkans resulting in temperatures of 42˚C to 45˚C for three consecutive days. [75] In September 2017 a heat wave affected a large portion of the Eastern United States; it is notable for producing unusually hot temperatures the latest in a calendar year in places ...
Beginning in March 2024, severe heat waves impacted Mexico, the Southern and Western United States, and Central America, leading to dozens of broken temperature records, [1] mass deaths of animals from several threatened species, water shortages requiring rationing, [2] increased forest fires, and over 155 deaths in Mexico with 2,567 people suffering from heat-related ailments. [3]
A major heat wave affected the Midwestern United States on August 23 and 24. Prior to the heat wave, 126 million Americans were under heat alerts. [134] At Chicago O'Hare International Airport, temperatures hit 98 °F (37 °C) on August 23, with a heat index reaching 116 °F (47 °C). On August 24, temperatures hit 100 °F (38 °C) at O'Hare ...
The 2021 Western North America heat wave was an extreme heat wave that affected much of Western North America from late June through mid-July 2021. [5] The heat wave affected Northern California, Idaho, Western Nevada, Oregon, and Washington in the United States, as well as British Columbia, and in its latter phase, Alberta, Manitoba, the Northwest Territories, Saskatchewan, and Yukon, all in ...
The extreme heat resulted in 569 deaths in Phoenix. [21] 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. [22]
Intense heat continued into August. In early August, a heat wave forced 80 million Americans under heat alerts. [38] Albany, New York set a new daily record high of 99 °F (37 °C) on August 4. [39] On August 7, Portland set a high temperature record of 96 °F (36 °C). [40] Boston set a new daily record high on August 8, at 98 °F (37 °C). [41]
An extreme heat wave affected much of Western North America from late June through mid-July 2021. [14] Rapid attribution analysis found this was a 1000-year weather event, made 150 times more likely by climate change.