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  1. Dictionary
    heatwave
    /ˈhiːtweɪv/

    noun

    • 1. a prolonged period of abnormally hot weather: "when a heatwave occurs many people become increasingly bad-tempered"

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  2. en.wikipedia.org › wiki › Heat_waveHeat wave - Wikipedia

    A heat wave [1] or heatwave, [2] sometimes described as extreme heat, is a period of abnormally hot weather. [ 3 ] : 2911 Definitions vary but are similar. [ 4 ] A heat wave is usually measured relative to the usual climate in the area and to normal temperatures for the season.

  3. wmo.int › topics › heatwaveHeatwave - World Meteorological Organization

    A heatwave is a period of abnormally hot weather that can last from a few days to months and pose serious risks for people and nature. WMO provides guidance, verification and collaboration on heatwave information and warnings.

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  5. www.metoffice.gov.uk › types-of-weather › temperatureWhat is a heatwave? - Met Office

    A heatwave is an extended period of hot weather relative to the expected conditions of the area at that time of year, which may be accompanied by high humidity. Learn how heatwaves are linked to climate change, how they affect the UK and what to do when they occur.

  6. www.who.int › health-topics › heatwavesHeatwaves - World Health Organization (WHO)

    Heatwaves, or heat and hot weather that can last for several days, can have a significant impact on society, including a rise in heat-related deaths. Heatwaves are among the most dangerous of natural hazards, but rarely receive adequate attention because their death tolls and destruction are not always immediately obvious.

  7. scijinks.gov › heatWhat Is a Heat Wave? | NOAA SciJinks – All About Weather

    Sep 11, 2024 · A heat wave is a period of unusually hot weather that lasts two or more days and is outside the historical averages for a given area. Learn how heat waves form, why they are dangerous, and how to stay safe from this web page by NOAA SciJinks.

  8. dictionary.cambridge.org › dictionary › englishHEATWAVE | English meaning - Cambridge Dictionary

    HEATWAVE definition: 1. a period of time such as a few weeks when the weather is much hotter than usual 2. a period of…. Learn more.

  9. www.britannica.com › science › heat-wave-meteorologyHeat wave | Temperature Extremes, Climate Change & Heat Stress

    Aug 6, 2024 · heat wave, period of prolonged abnormally high surface temperatures relative to those normally expected. Heat waves may span several days to several weeks and are significant causes of weather -related mortality, affecting developed and developing countries alike.