Author information: (1)Department of Environmental Health Sciences, and. heat wave - WordReference English dictionary, questions, discussion and forums. [49] Heat waves today in Europe and North America happen parallel to the conditions of atmospheric circulation. Hot humid air masses form over the Gulf of Mexico and the Caribbean Sea while hot dry air masses form over the desert Southwest and northern Mexico. Learn more. [46] High end farmlands have irrigation systems to back up crops with. The heat wave affected many people in various states and regions, including Madhya Pradesh, Vidarbha, Andhra Pradesh, Telangana, Bihar and Jharkhand.On 21 May the temperature in the Indian capital, New Delhi, was reported to be 42.6 °C (108.7 °F), with black asphalt roads reportedly melting and pedestrian crossing stripes curling. However, as the LPM of the building is fitted to reproduce the real input data from the building, it is expected that when data simulating a heat wave is passed through the LPM the results will be realistic. 'Nip it in the butt' or 'Nip it in the bud'? v. - The act of having anal intercourse with someone who has recently consumed very spicy food. The highest official temperatures recorded in South Africa (51.5 °C) was recorded one summer during a bergwind occurring along the Eastern Cape coastline. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. 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. Definition of heat-wave noun in Oxford Advanced American Dictionary. Test Your Knowledge - and learn some interesting things along the way. Although the definition of heat implicitly means the transfer of energy, the term heat transfer encompasses this traditional usage in many engineering disciplines and laymen language. During the 2006 North American heat wave, thousands of homes and businesses went without power, especially in California. Information and translations of heat wave in the most comprehensive dictionary definitions resource on the web. [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. Heat wave definition is - a period of unusually hot weather. A Relative Term However, there exist no universal definitions for a heat wave as it is relative to a specific area and to a certain time of year. [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. A period of abnormally and uncomfortably hot weather. It has been observed that for some heat waves, there is a compensatory decrease in overall mortality during the subsequent weeks after a heat wave. A heat wave is a hazard characterized by heat which is considered extreme and unusual in the area in which it occurs. [26] The average annual number of fatalities directly attributed to heat in the United States is about 400. Heat syncope is related to heat exposure that produces orthostatic hypotension. heatwave definition, meaning, English dictionary, synonym, see also 'heat',heated',heater',heaven', Reverso dictionary, English definition, English vocabulary In more simplified terms, the general rule of thumb is to have at least 3 days in a row of 90 degree weather. heat wave meaning: a period of days during which the weather is much hotter than usual. Heat wave definition, an air mass of high temperature covering an extended area and moving relatively slowly. 'Heat waves are one of the deadliest natural hazards facing humanity, and the threat they pose will only become more serious and more widespread as the climate crisis continues,' said Francesco Rocca, president of the International Federation of Red Cross and Red Crescent Societies (IFRC). The sweat ducts may become dilated and may eventually rupture, producing small pruritic vesicles on an erythematous base. The definition was enabled by the bureau's new heatwave forecast service, which allows it to map areas that are expected to have unusually hot conditions over a period of four days. 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… Typically a heat wave lasts two or more days. They usually develop in people performing heavy exercise while sweating profusely and replenishing fluid loss with non-electrolyte containing water. Each of the first three levels is associated with a particular state of readiness and response by the social and health services, and Level 4 is associated with more widespread response. Heo S(1), Bell ML(2), Lee JT(3). The length of time spent above that threshold determines the particular level. [44], Abnormally hot temperatures can cause electricity demand to increase during the peak summertime hours of 4 to 7 p.m. when air conditioners are straining to overcome the heat. Heat exhaustion is considered by experts to be the forerunner of heat stroke (hyperthermia). In every society, crime rates go up when temperatures go up, particularly violent crimes such as assault, murder, and rape. Heatwave Situation for Wednesday, Thursday, & Friday (3 days starting 2/12/2020) Areas of low-intensity heatwave experienced through northern WA, central NT, most of QLD, northeast SA and northeast NSW. Send us feedback. Daily Temperature and Income in the United States", "Heat Eases, but Thousands of Southern Californians Still Lack Power", "Heat and drought extremes likely to stress ecosystem productivity equally or more in a warmer, CO 2 rich future", "Extreme Heat Resilience Alliance: Reducing Extreme Heat Risk for Vulnerable People", "The world's getting hotter. [16] This is common in summer (in both Northern and Southern Hemispheres) as the jet stream 'follows the sun'. If this advice is not followed it may then lead to heat stroke. While there is no clear-cut numerical definition for what defines a heat wave across the United States (the criteria for defining an official heat wave varies by region), the National Oceanic Atmospheric Administration (NOAA) defines a heat wave as a period of abnormally and uncomfortably hot and unusually humid weather. Heat cramps are painful, often severe, involuntary spasms of the large muscle groups used in strenuous exercise. The NWS has created a de facto basic heat wave definition through the development of criteria for the issuance of heat watches and warnings. Heat rash affects areas of the body covered by tight clothing. [53] The effects of climate change have been projected to make heat waves in places such as Europe up to five times more likely to occur. The Weather Channel uses the following criteria for a heat wave: a minimum of ten states must have 90°F plus temperatures and the temperatures must be at least five degrees above normal in parts of that area for at least two days or more. Scientists predicted that in the days following the issuance of these warnings, many records for highest low temperatures will be broken. HEAT WAVE Definition: A heat wave refers to a prolonged period of hot weather, which may be accompanied by high humidity. 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 Among other effects, increased wildfires in places such as Spain can also be attributed to heat waves. Wearing support stockings and engaging in deep knee-bending movements can help promote venous blood return. (I.e. [54], In July 2019, over 50 million people in the United States were present in a jurisdiction with any type of heat advisory - heat is the deadliest type of extreme weather in the United States. How to use cold wave in a sentence. 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. 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]. 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. Define heat wave. Level 3 is triggered when the temperature has been above the threshold for the preceding day and night, and there is a 90% or higher chance that it will stay above the threshold in the following day. Such compensatory reductions in mortality suggest that heat affects especially those so ill that they "would have died in the short term anyway". [11] The Australian Bureau of Meteorology defines a heat wave as "three days or more of maximum and minimum temperatures that are unusual for the location". [28] Eric Klinenberg has noted that in the United States, the loss of human life in hot spells in summer exceeds that caused by all other weather events combined, including lightning, rain, floods, hurricanes, and tornadoes. See more. [5] Rory is still on the run with The Rogues. A definition based on Frich et al. 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. 177 were donated in May This month, we are on track to donate 184 home recent additions webmaster page banners feed a child Please tell us where you read or heard it (including the quote, if possible). It is also advised to wear loose-fitting clothing in the heat. [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). Recent extreme ~ s such as in Russia in 2010 are likely to become the new normal summer in a 4°C world. Subscribe to our free daily email and get a new idiom video every day! heat wave meaning: a period of days during which the weather is much hotter than usual. To be a heat wave such a period should last at least one day, but conventionally it lasts from several days to several weeks. This heat build-up causes air conditioners to turn on earlier and to stay on later in the day. ", "Hot Weather Tips and the Chicago Heat Plan", "Relation between Elevated Ambient Temperature and Mortality: A Review of the Epidemiologic Evidence", Near-Fatal Heat Stroke during the 1995 Heat Wave in Chicago. Another word for heat wave. For the first time, the Bureau of Meteorology has provided a national definition of a heatwave. Heat Wave. Information and translations of heat wave in the most comprehensive dictionary definitions resource on the web. [5] Rory is still on the run with The Rogues. [12], In the United Kingdom, the Met Office operates a Heat Health Watch system which places each Local Authority region into one of four levels. Heavy precipitation events ... heat wave Slow down and avoid strenuous activity if a heat wave is happening. Recent Examples on the Web Among Trout's memorable times: packing in players from around the world who were eager to hang out together, even during a sweltering heat wave July 2011, and setting up competitions between local celebrities. The many sport drinks on the market are a good source of electrolytes and are readily accessible. The associated itching may be treated with topical or systemic antihistamines. [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. Accessed 8 Dec. 2020. Typically a heat wave lasts two or more days. In addition, because in most of the world most of those suffering the impacts of a heat wave will be inside a building, and this will modify the temperatures they are exposed to, there is the need to link climate models to building models. ", "Europe Braces for 'Hottest Day of the Year, "June was hottest ever recorded on Earth, European satellite agency announces", "50 Million Americans Are Currently Living Under Some Type of Heat Warning", "Malawi heatwaves threaten tea yields and livelihoods – Future Climate Africa", 'Heat Dome' seals in sweltering temperatures, Social & Economic Costs of Temperature Extremes, National Centers for Environmental Information. Search heat wave and thousands of other words in English definition and synonym dictionary from Reverso. heat wave synonyms, heat wave pronunciation, heat wave translation, English dictionary definition of heat wave. The term is applied both to hot weather variations and to extraordinary spells of hot which may occur only once a century. Heat rash, also known as prickly heat, is a maculopapular rash accompanied by acute inflammation and blocked sweat ducts. Between 1992 and 2001, deaths from excessive heat in the United States numbered 2,190, compared with 880 deaths from floods and 150 from hurricanes. 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. [43], Additionally, high temperatures have a significant effect on income. [32] More than 70,000 Europeans died as a result of the 2003 European heat wave. Heat wave A period of abnormally hot weather lasting days to weeks. Older adults, very young children, and those who are sick or overweight are at a higher risk for heat-related illness. Noun . As shown by the deadly French heat wave in 2003, heat wave dangers result from the intricate association of natural and social factors. Meaning of heat wave. While definitions vary,[2] a heat wave is usually measured relative to the usual weather in the area and relative to normal temperatures for the season. Definition of heat wave written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. In the Netherlands, a heat wave is defined as a period of at least 5 consecutive days in which the maximum temperature in De Bilt exceeds 25 °C (77 °F), provided that on at least 3 days in this period the maximum temperature in De Bilt exceeds 30 °C (86 °F). [27] The 1995 Chicago heat wave, one of the worst in US history, led to approximately 739 heat-related deaths over a period of 5 days. heatwave (plural heatwaves) A period of very hot weather. The National Weather Service issues heat advisories and excessive heat warnings when unusual periods of hot weather are expected. [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. 2.3. [6] However, some nations have come up with their own criteria to define a heat wave. A basic definition of a heat wave implies that it is an extended period of unusually high atmosphere-related heat stress, which causes temporary modifications in lifestyle and which may have adverse health consequences for the affected population. Delivered to your inbox! Reduction of clouds increases shortwave radiation reaching the surface. [40], Another explanation for underreporting is the social attenuation in most contexts of heat waves as a health risk. [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? Level 2 is reached when there is a 60% or higher risk that the temperature will be above the threshold levels for two days and the intervening night. [45] 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. [4], A formal, peer-reviewed definition from the Glossary of Meteorology is:[5]. The SW winds on the back side of the High continue to pump hot, humid Gulf air northeastward resulting in a spell of hot and humid weather for much of the Eastern States. [ 6 ] A futuristic version of Heat Wave, calling himself Heatstroke, appears as … 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. A heat storm is a Californian term for an extended heat wave[citation needed]. Symptoms may include diarrhea, headache, nausea and vomiting, dizziness, tachycardia, malaise, and myalgia. 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