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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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    More definitions, origin and scrabble points

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

    A heat wave (or heatwave), 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. 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.

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

    Heatwaves can burden health and emergency services and also increase strain on water, energy and transportation resulting in power shortages or even blackouts. Food and livelihood security may also be strained if people lose their crops or livestock due to extreme heat.

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

    11 Jul 2024 · The Short Answer: A heat wave is a period of unusually hot weather that typically lasts two or more days. To be considered a heat wave, the temperatures have to be outside the historical averages for a given area.

  6. wmo.int › topics › heatwaveHeatwave

    A heatwave can be defined as a period where local excess heat accumulates over a sequence of unusually hot days and nights. Heatwaves amplify many risks, such as health-related or economic risks, including increased human mortality, drought and water quality, wildfire and smoke, power shortages and agricultural losses.

  7. www.merriam-webster.com › dictionary › heat waveHeat wave Definition & Meaning - Merriam-Webster

    11 Jul 2024 · : a period of unusually hot weather. Examples of heat wave in a Sentence. Recent Examples on the Web Factor in the effects of climate change — more-frequent heat waves and extreme temperatures — and the future of work in these states is increasingly dangerous.

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

    Heatwave definition - a threshold-based meteorological definition designed to provide the media and public with consistent and reliable messaging. Find out more about heatwaves and what to do...