Hurricane Sandy (unofficially referred to as Superstorm Sandy) was an extremely destructive and strong Atlantic hurricane, as well as the largest Atlantic hurricane on record as measured by diameter, with tropical-storm-force winds spanning . The storm inflicted nearly 70billion(2012USD)indamageandkilled233peopleacrosseightcountriesfromtheCaribbeantoCanada.Theeighteenthnamedstorm,tenthhurricane,andsecondmajorhurricaneofthe2012Atlantichurricaneseason,SandywasastormatitspeakintensitywhenitmadelandfallinCuba,thoughmostofthedamageitcausedwasafteritbecameaCategory1−equivalentextratropicalcycloneoffthecoastoftheNortheasternUnitedStates.SandydevelopedfromatropicalwaveinthewesternCaribbeanSeaonOctober22,quicklystrengthened,andwasupgradedtoTropicalStormSandysixhourslater.SandymovedslowlynorthwardtowardtheGreaterAntillesandgraduallyintensified.OnOctober24,Sandybecameahurricane,madelandfallnearKingston,Jamaica,re−emergedafewhourslaterintotheCaribbeanSeaandstrengthenedintoaCategory2hurricane.OnOctober25,SandyhitCubaasaCategory3hurricane,thenweakenedtoaCategory1hurricane.EarlyonOctober26,SandymovedthroughtheBahamas.OnOctober27,SandybrieflyweakenedtoatropicalstormandthenrestrengthenedtoaCategory1hurricane.EarlyonOctober29,Sandycurvedwest−northwest(the"leftturn"or"lefthook")andthenmovedashorenearBrigantine,NewJersey,justtothenortheastofAtlanticCity,asapost−tropicalcyclonewithhurricane−forcewinds.Sandycontinueddriftinginlandforanotherfewdayswhilegraduallyweakening,untilitwasabsorbedbyanotherapproachingextratropicalstormonNovember2.InJamaica,windsleft70percentofresidentswithoutelectricity,blewroofsoffbuildings,killedoneperson,andcausedabout100 million (2012 USD) in damage. Sandy's outer bands brought flooding to Haiti, killing at least 54, causing food shortages, and leaving about 200,000 homeless; the hurricane also caused two deaths in the Dominican Republic.