“Heat wave.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20wave. Antonyms . HEAT WAVE Definition: A heat wave refers to a prolonged period of hot weather, which may be accompanied by high humidity. Definitive therapy includes removing patients from the heat and replenishing their fluids. A heat wave is usually defined as a period of 3 or more consecutive days with temperatures of 32° C or higher. [14] This was used to estimate heat waves occurrence at the global scale from 1901 to 2010, finding a substantial and sharp increase in the amount of affected areas in the last two decades.[15]. heat wave: A climatologic event in which the air temperature is extremely high for an extended period Mortality risk groups Elders, infants, disabled, indigent, drug/alcohol abusers heat wave synonyms, heat wave pronunciation, heat wave translation, English dictionary definition of heat wave. Heat rash, also known as prickly heat, is a maculopapular rash accompanied by acute inflammation and blocked sweat ducts. Patients with mild cramps can be given oral .2% salt solutions, while those with severe cramps require IV isotonic fluids. A heat wave is a prolonged period of extremely high temperatures for a particular region. The chronically ill and elderly are often taking prescription medications (e.g., diuretics, anticholinergics, antipsychotics, and antihypertensives) that interfere with the body's ability to dissipate heat.[25]. Typically a heat wave lasts two or more days. Define heat wave. This hypotension can precipitate a near-syncopal episode. Definition of heat-wave noun in Oxford Advanced American Dictionary. A definition based on Frich et al. The length of time spent above that threshold determines the particular level. Heat cramps tend to occur after intense exertion. Wearing support stockings and engaging in deep knee-bending movements can help promote venous blood return. Meaning of heat wave. Heat waves often lead to electricity spikes due to increased air conditioning use, which can create power outages, exacerbating the problem. The World Meteorological Organization is specific in its definition by stating that a heat wave is when the daily maximum temperature for more than five consecutive days exceeds the average maximum temperature by 9 degrees. Floods, Tornadoes, Hurricanes, Wildfires, Earthquakes... Why We Don't Prepare, Most People Struck Down by Summer Heat Are Poor, "Heat Wave Death Toll Rises to 2,000 in Pakistan's Financial Hub", "Heatstroke leaves another 26 dead in Sindh", "A comparison of future weather created from morphed observed weather and created by a weather generator", "On the creation of future probabilistic design weather years from UKCP09", "A comparison of structural and behavioural adaptations to future proofing buildings against higher temperatures", "Changes in internal temperatures within the built environment as a response to a changing climate", "The Impact of Heat Waves and Cold Spells on Mortality Rates in the Dutch Population", "The 2003 Heat Wave in France: Dangerous Climate Change Here and Now", "Does the Environment Still Matter? Extreme heat wave events are predicted to happen with increased global warming, which puts stress on ecosystems. Learn more. The 2009 South Eastern Australia Heat Wave caused the city of Melbourne, Australia to experience some major power disruptions which left over half a million people without power as the heat wave blew transformers and overloaded a power grid. All Free. [48], Climate models reveal that future heat waves will have a more intense geographic pattern. After discharge from the hospital, patients are instructed to rest, drink plenty of fluids for 2–3 hours, and avoid the heat for several days. In his study of heat-wave behavior, focusing particularly on seniors in Philadelphia, Phoenix, Toronto, and Dayton, Ohio, he found that people over 65 "don't consider themselves seniors." A heat wave, or heatwave,[1] is a period of excessively hot weather, which may be accompanied by high humidity, especially in oceanic climate countries. Symptoms may include diarrhea, headache, nausea and vomiting, dizziness, tachycardia, malaise, and myalgia. [50] Stress on ecosystems due to future intensified heat waves will reduce biological productivity. [36][37] Other work has shown that future mortality due to heat waves could be reduced if buildings were better designed to modify the internal climate, or if the occupants were better educated about the issues, so they can take action in time. Temperatures raised up to locally 47 degrees Celsius. Heat syncope is believed to result from intense sweating, which leads to dehydration, followed by peripheral vasodilation and reduced venous blood return in the face of decreased vasomotor control. Heat wave definition: unusually hot weather , resulting from a slowly moving air mass of relatively high... | Meaning, pronunciation, translations and examples Heat wave definition, an air mass of high temperature covering an extended area and moving relatively slowly. Heat waves are a major cause of weather-related deaths. In 1900, A. T. Burrows more rigidly defined a "hot wave" as a spell of three or more days on each of which the maximum shade temperature reaches or exceeds 90°F. Typically a heat wave lasts two or more days. NWS definition of heat wave. Heavy precipitation events ... heat wave Slow down and avoid strenuous activity if a heat wave is happening. [18], In the Eastern United States a heat wave can occur when a high pressure system originating in the Gulf of Mexico becomes stationary just off the Atlantic Seaboard (typically known as a Bermuda High). Level 4 is triggered if conditions are more severe than those of the preceding three levels. Heat Stroke A condition resulting from excessive exposure to intense heat, characterized by high fever, collapse, and sometimes convulsions or coma. )[55], In addition to posing threat to human health, heat waves significantly threaten agricultural production. A heat wave is a hazard characterized by heat which is considered extreme and unusual in the area in which it occurs. Learn more. When a region comes under the influence of a high pressure system, air gets pushed towards the surface of the earth (it gets compressed), and it begins to heat up. Definition of heat wave in the Definitions.net dictionary. In 2019, heat waves in the Mulanje region of Malawi experienced temperatures as high as 40 degrees celsius. Information and translations of heat wave in the most comprehensive dictionary definitions resource on the web. Learn a new word every day. Antonyms . n. A period of unusually hot weather. A heat wave is a period of abnormally and uncomfortably hot and usually humid weather. These criteria involve nationwide standards but allow deviations for individual stations based on local conditions ().This approach implicitly recognizes the geographically variable nature of heat waves and their impact (Kalkstein and Davis 1989). Level 1 is normal summer conditions. What is the definition for a UK heatwave? [9] In the Northeast, a heat wave is typically defined as three consecutive days where the temperature reaches or exceeds 90 °F (32.2 °C), but not always as this ties in with humidity levels to determine a heat index threshold. If this continues for a duration of time it can lead to the development of chronic dermatitis or a secondary bacterial infection. [40], Another explanation for underreporting is the social attenuation in most contexts of heat waves as a health risk. Heating Degree Days (abbrev. Another word for heat wave. [49], Heat waves and droughts as a result, minimize ecosystem carbon uptake. Noun . [ 6 ] A futuristic version of Heat Wave, calling himself Heatstroke, appears as part of the 25th Century cops known as The Renegades . Heat transfer is generally described as including the mechanisms of heat conduction , heat convection , thermal radiation , but may include mass transfer and heat in processes of phase changes . With the current concern for global warming it is reasonable to suppose that they may increase in frequency, severity, duration, or areal extent in the future. Heat waves form when high pressure aloft (from 10,000–25,000 feet (3,000–7,600 metres)) strengthens and remains over a region for several days up to several weeks. This is believed to lead to hyponatremia that induces cramping in stressed muscles. heat wave meaning: a period of days during which the weather is much hotter than usual. A heat wave is simply a period of unusually hot weather that typically lasts two or more days. Noun . [56], Prolonged period of excessively hot weather, The examples and perspective in this section, Learn how and when to remove this template message, "More Intense, More Frequent, and Longer Lasting Heat Waves in the 21st Century", 10.1175/1520-0450(2001)040<0762:OTDOAH>2.0.CO;2, "Observed coherent changes in climatic extremes during the second half of the twentieth century", "Värmebölja | Klimat | Kunskapsbanken | SMHI", "Glossary - NOAA's National Weather Service", "Half the country wilts under unrelenting heat", "Extreme Heat Services for South Australia", "Top ten European heatwaves since 1950 and their occurrence in the coming decades", "Has global warming brought an early summer to the US? Heat Wave. Under high pressure, the air subsides (sinks) toward the surface, warming and drying adiabatically, inhibiting convection and preventing the formation of clouds. [citation needed]. To be a heat wave such a period should last at least one day, but conventionally it lasts from several days to several weeks. [22][23][24], The heat index (as shown in the table above) is a measure of how hot it feels when relative humidity is factored with the actual air temperature. Study: Global Warming to Bring Increased Heat Waves to U.S. "Heat wave frequency variability over North America: Two distinct leading modes", Global Warming Makes Heat Waves More Likely, Study Finds, https://en.wikipedia.org/w/index.php?title=Heat_wave&oldid=988860250, Articles with unsourced statements from October 2020, Articles with limited geographic scope from July 2015, Articles with unsourced statements from July 2018, Articles to be expanded from February 2020, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 November 2020, at 18:08. How to use cold wave in a sentence. A UK heatwave threshold is met when a location records a period of at least three consecutive days with daily maximum temperatures meeting or exceeding the heatwave temperature threshold. [ 6 ] A futuristic version of Heat Wave, calling himself Heatstroke, appears as … In parts of the world where summer conditions often exceed the physiologic threshold—the point at which adequate removal of heat from the body is impeded—behavior… [50] This will cause changes in the ecosystem's carbon cycle feedback because there will be less vegetation to hold the carbon from the atmosphere, which will only contribute more to atmospheric warming. High HUMIDITY is not a requisite, yet most, but not the worst, heat waves are oppressively humid. Traveling to a warm climate from a cold one or living in an area that has experienced an early heat wave can put you at risk of a heat-related illness because your body hasn't had a chance to get used to the higher temperatures. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Heat rash affects areas of the body covered by tight clothing. Heat wave A period of abnormally hot weather lasting days to weeks. Heat Stroke A condition resulting from excessive exposure to intense heat, characterized by high fever, collapse, and sometimes convulsions or coma. The World Meteorological Organization, defines a heat wave as 5 or more consecutive days of prolonged heat in which the daily maximum temperature is higher than the average maximum temperature by 5 °C (9 °F) or more. The data generated with the Munner model, may not be as accurate during a heat wave (as this is by definition an exceptional event). In this paper we count this event as having a total duration of 7 days, composed of an initial 3‐day‐long heat wave with four additional hot days compounded onto it. [50], Policy makers, funders and researchers responding to the increasing heatwaves created the Extreme Heat Resiliance Alliance coalition under the Atlantic Council to advocate for naming heatwaves, measuring them, and ranking them to build better awareness of their impacts.[51][52]. [49] Model results show that areas associated with the severe heat waves in Chicago in 1995 and Paris in 2003 will experience more intense, more frequent, and longer-lasting heat waves in the second half of the 21st century. See the full definition for heat wave in the English Language Learners Dictionary, Thesaurus: All synonyms and antonyms for heat wave, Britannica English: Translation of heat wave for Arabic Speakers, Britannica.com: Encyclopedia article about heat wave.
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