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A high pressure system in the upper atmosphere traps heat near the ground, forming a heat wave (for North America in this example). A heat wave or heatwave, sometimes described as extreme heat, is a period of abnormally hot weather [1]: 2911 generally considered to be at least five consecutive days.
The amount of Sun energy reaching a location on Earth ("insolation", shown in blue) varies through the seasons.As it takes time for the seas and lands to heat or cool, the surface temperatures will lag the primary cycle by roughly a month, although this will vary from location to location, and the lag is not necessarily symmetric between summer and winter.
Fully subjected to the heat wave, Wichita had an unusually hot summer in 2011. Wichita reached a temperature of 111 °F (44 °C) twice over the course of the heat wave, once in July, and once in August. Daytime highs in the months of June, July, and August averaged almost 9 °F over prior observed normals. The year was also substantially drier ...
Human-caused global warming made July hotter for four out of five people on Earth, with more than 2 billion people feeling climate change-boosted warmth daily, according to a flash study. More ...
Blazing hot summer a sign of the times due to climate change, writes columnist Mark Murphy.
Last three months said to have hottest summer in Northern Hemisphere and warmest winter in Southern Hemisphere
In a heat wave beginning on 8 July, the United Kingdom saw its first ever red extreme heat warning, with a national emergency declared on 15 July. [19] An unconfirmed report from the Met Office on 19 July indicated a new record temperature for the United Kingdom, 40.3 °C (104.5 °F). This is the first time the temperature exceeded 40 °C (104 ...
Anticyclone conditions over Russia resemble those in the 2010 heat waves, with parts of Siberia were 15 °C (27 °F) higher than normal. [3] The shores of the Barents Sea saw hotter temperatures than beaches in Italy and southern France, around 25–30 °C (77–86 °F) for several days. [4]