The NWS has created a de facto basic heat wave definition through the development of criteria for the issuance of heat watches and warnings. WikiMatrix When promoting the album in the United States, the group appeared on American Bandstand, performing "(Love Is Like a ) Heat Wave ", a cover of the hit song by the Motown girl group Martha and the Vandellas. [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. Most patients will require fluid replacement with IV isotonic fluids at first. Comparison of health risks by heat wave definition: Applicability of wet-bulb globe temperature for heat wave criteria. 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. To be a heat wave such a period should last at least one day, but conventionally it lasts from several days to several weeks. American Heritage® Dictionary of the English Language, Fifth Edition. This definition of a heat wave is also used in Belgium and Luxembourg. 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. During the 2006 North American heat wave, thousands of homes and businesses went without power, especially in California. [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. Heo S(1), Bell ML(2), Lee JT(3). Furthermore, in politically unstable countries, high temperatures are an aggravating factor that lead toward civil wars. [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. What is the definition for a UK heatwave? For the first time, the Bureau of Meteorology has provided a national definition of a heatwave. Rehydration with salt-containing fluids provides rapid relief. '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). Information and translations of heat wave in the most comprehensive dictionary definitions resource on the web. A heat storm is a Californian term for an extended heat wave[citation needed]. [34][35], Our concern now is focusing on predicting the future likelihood of heat waves and their severity. According to another prior heat wave definition (i.e., Perkins & Alexander, 2012) this would constitute two 3‐day‐long heat waves. Meaning of heat wave. [33] Also more than 2,000 people died in Karachi, Pakistan in June 2015 due to a severe heat wave with temperatures as high as 49 °C (120 °F). In more simplified terms, the general rule of thumb is to have at least 3 days in a row of 90 degree weather. [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. 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. 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 marine heatwave is defined a when seawater temperatures exceed a seasonally-varying threshold (usually the 90th percentile) for at least 5 consecutive days. 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. cold wave; Translations . Heat storms occur when the temperature reaches 100 °F (37.8 °C) for three or more consecutive days over a wide area (tens of thousands of square miles)[citation needed]. As a result, this upper level high pressure also moves slowly. Definition of heat wave in the Definitions.net dictionary. 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 . If a hot spell extends to three days or more, however, nighttime temperatures do not cool down, and the thermal mass in homes and buildings retains the heat from previous days. Heat wave definition: unusually hot weather , resulting from a slowly moving air mass of relatively high... | Meaning, pronunciation, translations and examples Level 1 is normal summer conditions. Sun kinking is caused when certain types of rail design like short section rails welded together or fish plate rails expand and push on other sections of rail causing them to warp and kink. In every society, crime rates go up when temperatures go up, particularly violent crimes such as assault, murder, and rape. The heat edema usually resolves within several days after the patient becomes acclimated to the warmer environment. Cold wave definition is - an unusually large and rapid drop in temperature over a short period of time (such as 24 hours). 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. One public health measure taken during heat waves is the setting-up of air-conditioned public cooling centers. Extreme heat wave events are predicted to happen with increased global warming, which puts stress on ecosystems. Heat syncope is related to heat exposure that produces orthostatic hypotension. Test Your Knowledge - and learn some interesting things along the way. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. On the equator side of the jet stream, in the upper layers of the atmosphere, is the high pressure area. Severe heat waves have caused catastrophic crop failures, thousands of deaths from hyperthermia, and widespread power outages due to increased use of air conditioning. Definition of heat wave in the Definitions.net dictionary. 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. [16] This is common in summer (in both Northern and Southern Hemispheres) as the jet stream 'follows the sun'. cold wave; Translations . As shown by the deadly French heat wave in 2003, heat wave dangers result from the intricate association of natural and social factors. The precursor to a heat wave is an area of high pressure that develops in the mid-levels of the atmosphere (10,000-20,000+ft) and strengthens. [50] Stress on ecosystems due to future intensified heat waves will reduce biological productivity. heatwave (plural heatwaves) A period of very hot weather. heatwave synonyms, heatwave pronunciation, heatwave translation, English dictionary definition of heatwave. [ 6 ] A futuristic version of Heat Wave, calling himself Heatstroke, appears as … [10] The same does not apply to drier climates. [27] Part of the mortality observed during a heat wave, however, can be attributed to a so-called "harvesting effect", a term for a short-term forward mortality displacement. If you're not used to the heat, you're more susceptible to heat-related illnesses, such as heat exhaustion. A heat wave is usually defined as a period of 3 or more consecutive days with temperatures of 32° C or higher. [49], Heat waves and droughts as a result, minimize ecosystem carbon uptake. The temperatures have to be outside the historical averages for a given area. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! You can either type in the word you are looking for in the box below or browse by letter. Heat waves can and do cause roads and highways to buckle and melt,[47] water lines to burst, and power transformers to detonate, causing fires. Heat wave A period of abnormally hot weather lasting days to weeks. Each heat wave definition is analyzed with respect to five aspects—the yearly number of heat waves (HWN), length of the longest yearly event (HWD), the yearly sum of participating heat wave days (HWF), the hottest day of hottest yearly event (HWA), and the average magnitude of all yearly heat waves (HWM), all calculated yearly. Heatwave conditions are defined by the maximum daytime temperature and minimum nighttime temperature rising above the threshold for a particular region. Author information: (1)School of Forestry and Environmental Studies, Yale University, New Haven, United States. During the disastrous heat wave that struck Europe in 2003, fires raged through Portugal, destroying over 3,010 square kilometres (1,160 sq mi) or 301,000 hectares (740,000 acres) of forest and 440 square kilometres (170 sq mi) or 44,000 hectares (110,000 acres) of agricultural land and causing an estimated €1 billion worth of damage. 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. Define heat wave. What does heat wave mean? HEAT WAVE Definition: A heat wave refers to a prolonged period of hot weather, which may be accompanied by high humidity. A definition based on Frich et al. Heat cramps are painful, often severe, involuntary spasms of the large muscle groups used in strenuous exercise. According to another prior heat wave definition (i.e., Perkins & Alexander, 2012) this would constitute two 3‐day‐long heat waves. 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. 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. Noun . Heat waves and a late rain season resulted in significant leaf scorching of tea leaves in Malawi, leading to reduced yields. 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. See the 2006 North American heat wave article about heat waves causing physical damage. Such compensatory reductions in mortality suggest that heat affects especially those so ill that they "would have died in the short term anyway". 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. The associated itching may be treated with topical or systemic antihistamines. Definition of heatwave noun in Oxford Advanced Learner's Dictionary. Subscribe to our free daily email and get a new idiom video every day! Temperatures raised up to locally 47 degrees Celsius. Symptoms may include diarrhea, headache, nausea and vomiting, dizziness, tachycardia, malaise, and myalgia. 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). A heat wave is a period of abnormally and uncomfortably hot and usually humid weather. A heat wave is a prolonged period of extremely high temperatures for a particular region. Heat Stroke A condition resulting from excessive exposure to intense heat, characterized by high fever, collapse, and sometimes convulsions or coma. Learn more. Learn more. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. 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. The air warms as it descends from the Karoo interior, and the temperature will rise about 10 °C from the interior to the coast. The data generated with the Munner model, may not be as accurate during a heat wave (as this is by definition an exceptional event). A heat wave is usually defined as a period of 3 or more consecutive days with temperatures of 32° C or higher. If a heat wave occurs during a drought, which dries out vegetation, it can contribute to bushfires and wildfires. 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. What is the definition for a UK heatwave? How to use cold wave in a sentence. 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. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. The salt content is adjusted as necessary once the electrolyte levels are known. Accessed 8 Dec. 2020. Learn more. Heat cramps tend to occur after intense exertion. 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… heatwave definition, meaning, English dictionary, synonym, see also 'heat',heated',heater',heaven', Reverso dictionary, English definition, English vocabulary [49] Increased anthropogenic activities causing increased greenhouse gas emissions show that heat waves will be more severe. What does heat wave mean? Successive heatwaves with gaps of 2 days or less are considered part of the same event. Heavy precipitation events ... heat wave Slow down and avoid strenuous activity if a heat wave is happening. This hypotension can precipitate a near-syncopal episode. 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. There is no universal temperature threshold for a heat wave, as social and cultural practices largely define perceptions of and responses to heat. [49] Heat waves today in Europe and North America happen parallel to the conditions of atmospheric circulation. The term is applied both to hot weather variations and to extraordinary spells of hot which may occur only once a century. No treatment is required, although wearing support stockings and elevating the affected legs will help minimize the edema. Among other effects, increased wildfires in places such as Spain can also be attributed to heat waves. 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. Information and translations of heat wave in the most comprehensive dictionary definitions resource on the web. As a result, available electricity supplies are challenged during a higher, wider, peak electricity consumption period. The World Meteorological Organization (WMO) defines a heat wave as five or more consecutive days in which the average daily maximum temperature is exceeded by at least 5°C, the normal period being 1961-1990. 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. Antonyms . Recent extreme ~ s such as in Russia in 2010 are likely to become the new normal summer in a 4°C world. Define heatwave. If this continues for a duration of time it can lead to the development of chronic dermatitis or a secondary bacterial infection. 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. A period of abnormally and uncomfortably hot weather. It could last from several days to several weeks. In Adelaide, South Australia, a heat wave is defined as five consecutive days at or above 35 °C (95 °F), or three consecutive days at or over 40 °C (104 °F). They should move to a cooler environment and lie down if they recognize the initial symptoms. Wearing support stockings and engaging in deep knee-bending movements can help promote venous blood return. Heat waves are the most lethal type of weather phenomenon in the United States. It may even resemble heat stroke, with the difference being that the neurologic function remains intact. 2.3. Humidities are usually very low, and the temperatures can be over 40 °C in summer. Definition of heat wave in the Definitions.net dictionary. 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. As these high pressure a… Learn a new word every day. Meaning of heat wave. Delivered to your inbox! Heat Wave. Under high pressure, the air subsides (sinks) toward the surface, warming and drying adiabatically, inhibiting convection and preventing the formation of clouds. This means producing example time series of future weather. [13], A more general indicator that allows comparing heat waves in different regions of the World, characterized by different climates, has been recently developed. Heat Stroke A condition resulting from excessive exposure to intense heat, characterized by high fever, collapse, and sometimes convulsions or coma. 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. Heat waves and health outcomes in Alabama (USA): the importance of heat wave definition. In Denmark, a national heat wave (hedebølge) is defined as a period of at least 3 consecutive days of which period the average maximum temperature across more than fifty percent of the country exceeds 28 °C (82.4 °F) – the Danish Meteorological Institute further defines a "warmth wave" (varmebølge) when the same criteria are met for a 25 °C (77.0 °F) temperature,[7] while in Sweden, a heat wave is defined as at least 5 days in a row with a daily high exceeding 25 °C (77.0 °F).[8]. One of his older respondents said: "Heat doesn't bother me much, but I worry about my neighbors. 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. Definitive therapy includes removing patients from the heat and replenishing their fluids. [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]. A heat wave is a prolonged period of excessively hot weather, which may be accompanied by high humidity.There is no universal definition of a heat wave; [1] the term is relative to the usual weather in the area and relative to normal temperatures for the season. 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. (I.e. )[55], In addition to posing threat to human health, heat waves significantly threaten agricultural production. All Free. [5] Rory is still on the run with The Rogues. Typically a heat wave lasts two or more days. The great heatwave of 2018 impacted millions of people. 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). Noun . ", "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. “Heat wave.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/heat%20wave. heat wave synonyms, heat wave pronunciation, heat wave translation, English dictionary definition of heat wave. Send us feedback. heat wave meaning: a period of days during which the weather is much hotter than usual. [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? 'Nip it in the butt' or 'Nip it in the bud'? 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. If infection occurs a regimen of antibiotics is required. [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. A low pressure at the surface leads to surface wind from lower latitudes that brings warm air, enhancing the warming. The many sport drinks on the market are a good source of electrolytes and are readily accessible. [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. 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. Heat waves can usually be detected using forecasting instruments so that a warning call can be issued. Heat Wave A period of abnormally and uncomfortably hot and unusually humid weather. [19], In the Western Cape Province of South Africa, a heat wave can occur when a low pressure offshore and high pressure inland air combine to form a Bergwind. Antonyms . [4], A formal, peer-reviewed definition from the Glossary of Meteorology is:[5]. 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. n. A period of unusually hot weather. n. A period of unusually hot weather. 's Heat Wave Duration Index is that a heat wave occurs when the daily maximum temperature of more than five consecutive days exceeds the average maximum temperature by 5 °C (9 °F), the normal period being 1961–1990. 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. [5] Rory is still on the run with The Rogues. [20][21], Global warming boosts the probability of extreme weather events, like heat waves, far more than it boosts more moderate events. [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. Sun kinking can be a serious problem in hotter climates like Southern USA, parts of Canada, the Middle East, etc. They usually develop in people performing heavy exercise while sweating profusely and replenishing fluid loss with non-electrolyte containing water. Scientists predicted that in the days following the issuance of these warnings, many records for highest low temperatures will be broken. This heat build-up causes air conditioners to turn on earlier and to stay on later in the day. A heat wave is simply a period of unusually hot weather that typically lasts two or more days. heat wave synonyms, heat wave pronunciation, heat wave translation, English dictionary definition of heat wave. heat wave - A period of higher-than-normal temperatures. Heat Wave. 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. A heat wave is a hazard characterized by heat which is considered extreme and unusual in the area in which it occurs. A heat wave, by definition is a period of time in which the temperatures are higher than normal for that region at that time of year. [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). 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. Heat Wave and the Rogues visit Sam Scudder's old hideout and unveil a giant mirror with the words In Case of Flash: Break Glass written on it. 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. Heat waves can also damage rail roads, such as buckling and kinking rails, which can lead to slower traffic, delays, and even cancellations of service when rails are too dangerous to traverse by trains. Heat waves often lead to electricity spikes due to increased air conditioning use, which can create power outages, exacerbating the problem. If this advice is not followed it may then lead to heat stroke. 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. See more. Define heat wave. Author information: (1)Department of Environmental Health Sciences, and. A study of counties in the United States found that economic productivity of individual days declines by about 1.7% for each degree Celsius above 15 °C (59 °F). "[31], According to the Agency for Health care Research and Quality, about 6,200 Americans are hospitalized each summer due to excessive heat, and those at highest risk are poor, uninsured or elderly. [ 6 ] A futuristic version of Heat Wave, calling himself Heatstroke, appears as part of the 25th Century cops known as The Renegades . Alternatively, the surface winds could blow from the hot continental interior towards the coastal zone, leading to heat waves there, or from a high elevation towards low elevation, enhancing the subsidence and therefore the adiabatic warming. 'All Intensive Purposes' or 'All Intents and Purposes'? NWS definition of heat wave. However, once heat rash has developed, the initial treatment involves the application of chlorhexidine lotion to remove any desquamated skin. period of very hot weather. heat wave A period of time in which the weather is unusually and persistently hot. 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. To be a heat wave such a period should last at least one day, but conventionally it lasts from several days to several weeks. American Heritage® Dictionary of the English Language, Fifth Edition. Heat exhaustion is considered by experts to be the forerunner of heat stroke (hyperthermia). 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. A heat wave is an extended period of unusually high temperatures and often high humidity that causes temporary modifications in lifestyle and may have adverse health effects on affected human populations. Heating Degree Days (abbrev. Temperatures that people from a hotter climate consider normal can be called a heat wave in a cooler area if they are outside the normal climate pattern for that area.[3].
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