Query: Severe ‘snowmageddon’ winters are now strongly linked to soaring polar temperatures, say researchers, with deadly summer heatwaves and torrential floods also probably linked.

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Year Without a Summer <=SEP=> The year 1816 is known as the Year Without a Summer ( also the Poverty Year , the Summer that Never Was , Year There Was No Summer , and Eighteen Hundred and Froze to Death ) because of severe climate abnormalities that caused average global temperatures to decrease by 0.4 -- 0.7 ° C ( 0.7 -- 1.3 ° F ) . This resulted in major food shortages across the Northern Hemisphere .   Evidence suggests that the anomaly was predominantly a volcanic winter event caused by the massive 1815 eruption of Mount Tambora in the Dutch East Indies ( the largest eruption in at least 1,300 years after the extreme weather events of 535 -- 536 ) , perhaps plus the 1814 eruption of Mayon in the Philippines . The Earth had already been in a centuries-long period of global cooling that started in the 14th century . Known today as the Little Ice Age , it had already caused considerable agricultural distress in Europe . The Little Ice Age 's existing cooling was aggravated by the eruption of Tambora , which occurred during its concluding decades .

Rain <=SEP=> Rain is liquid water in the form of droplets that have condensed from atmospheric water vapor and then precipitated -- that is , become heavy enough to fall under gravity . Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth . It provides suitable conditions for many types of ecosystems , as well as water for hydroelectric power plants and crop irrigation .   The major cause of rain production is moisture moving along three-dimensional zones of temperature and moisture contrasts known as weather fronts . If enough moisture and upward motion is present , precipitation falls from convective clouds ( those with strong upward vertical motion ) such as cumulonimbus ( thunder clouds ) which can organize into narrow rainbands . In mountainous areas , heavy precipitation is possible where upslope flow is maximized within windward sides of the terrain at elevation which forces moist air to condense and fall out as rainfall along the sides of mountains . On the leeward side of mountains , desert climates can exist due to the dry air caused by downslope flow which causes heating and drying of the air mass . The movement of the monsoon trough , or intertropical convergence zone , brings rainy seasons to savannah climes .   The urban heat island effect leads to increased rainfall , both in amounts and intensity , downwind of cities . Global warming is also causing changes in the precipitation pattern globally , including wetter conditions across eastern North America and drier conditions in the tropics . Antarctica is the driest continent . The globally averaged annual precipitation over land is 715 mm , but over the whole Earth it is much higher at 990 mm . Climate classification systems such as the Köppen classification system use average annual rainfall to help differentiate between differing climate regimes . Rainfall is measured using rain gauges . Rainfall amounts can be estimated by weather radar .   Rain is also known or suspected on other planets , where it may be composed of methane , neon , sulfuric acid , or even iron rather than water .

Heat wave <=SEP=> A heat wave is a prolonged period of excessively hot weather , which may be accompanied by high humidity , especially in oceanic climate countries . While definitions vary , a heat wave is measured relative to the usual weather in the area and relative to normal temperatures for the season . Temperatures that people from a hotter climate consider normal can be termed a heat wave in a cooler area if they are outside the normal climate pattern for that area .   The term is applied both to hot weather variations and to extraordinary spells of hot which may occur only once a century . Severe heat waves have caused catastrophic crop failures , thousands of deaths from hyperthermia , and widespread power outages due to increased use of air conditioning . A heat wave is considered extreme weather , and a danger because heat and sunlight may overheat the human body .

List of extreme weather records in Pakistan <=SEP=> The weather extremes in Pakistan include high and low temperatures , Heaviest rainfall and flooding . The highest temperature ever recorded in Pakistan is 54 ° C which was recorded in Turbat , Balochistan 30 May 2017 It was not only the hottest temperature ever recorded in Pakistan but also the hottest reliably measured temperature ever recorded on the continent of Asia . and the fourth-highest temperature ever recorded on earth . The second-highest temperature ever recorded in Pakistan is 53 C which was recorded in Larkana , Sindh on 26 May 2010 . It is hottest city in Pakistan , as well as the second hottest city in the world , but it is second-hottest place in Pakistan and fifth-hottest place of world . It is fifth-highest temperature ever recorded on Earth . The highest rainfall of 620 mm was recorded in Islamabad during 24 hours on 23 July 2001 . The record-breaking rain fell in just 10 hours .

Global storm activity of 2010 <=SEP=> The global storm activity of 2010 includes major meteorological events in the Earth 's atmosphere during the year , including winter storms ( blizzards , ice storms , European windstorms ) , hailstorms , out of season monsoon rain storms , extratropical cyclones , gales , microbursts , flooding , rainstorms , tropical cyclones , and other severe weather events .   The thunderstorm season for the Northern Hemisphere began this time of year , beginning on March 1 , and ending on August 31 .