Hurricane Sandy was a hurricane that devastated portions of the Caribbean and the Mid-Atlantic and Northeastern United States during late October 2012, with lesser impacts in the Southeastern and Midwestern states and Eastern Canada. Sandy, classified as the eighteenth named storm and tenth hurricane of the 2012 Atlantic hurricane season, was a Category 2 storm at its peak intensity. While it was a Category 1 storm off the coast of the Northeastern United States, the storm became the largest Atlantic hurricane on record (as measured by diameter, with winds spanning 1,100 miles (1,800 km)). Preliminary estimates of losses due to damage and business interruption are estimated at $65.6 billion (2012 USD), which would make it the second-costliest Atlantic hurricane, behind only Hurricane Katrina. At least 253 people were killed along the path of the storm in seven countries.
Sandy developed from a tropical wave in the western Caribbean Sea on October 22, quickly strengthened, and was upgraded to Tropical Storm Sandy six hours later. Sandy moved slowly northward toward the Greater Antilles and gradually intensified. On October 24, Sandy became a hurricane, made landfall near Kingston, Jamaica, a few hours later, re-emerged into the Caribbean Sea and strengthened into a Category 2 hurricane. On October 25, Sandy hit Cuba, then weakened to a Category 1 hurricane. Early on October 26, Sandy moved through the Bahamas. On October 27, Sandy briefly weakened to a tropical storm and then restrengthened to a Category 1 hurricane. Early on October 29, Sandy curved north-northwest and thenmoved ashore near Atlantic City, New Jersey, as a post-tropical cyclone with hurricane-force winds. Shortly after, media outlets were calling the storm "Superstorm Sandy".
In Jamaica, winds left 70% of residents without electricity, blew roofs off buildings, killed one, and caused about $55.23 million (2012 USD) in damage. In Haiti, Sandy's outer bands brought flooding that killed at least 54, caused food shortages, and left about 200,000 homeless. In the Dominican Republic, two died. In Puerto Rico, one man was swept away by a swollen river. In Cuba, there was extensive coastal flooding and wind damage inland, destroying some 15,000 homes, killing 11, and causing $2 billion (2012 USD) in damage. In The Bahamas, two died amid an estimated $300 million (2012 USD) in damage. In Canada, two were killed in Ontario and an estimated $100 million in damage was caused throughout Ontario and Quebec.
In the United States, Hurricane Sandy affected 24 states, including the entire eastern seaboard from Florida to Maine and west across theAppalachian Mountains to Michigan and Wisconsin, with particularly severe damage in New Jersey and New York. Its storm surge hit New York Cityon October 29, flooding streets, tunnels and subway lines and cutting power in and around the city. Damage in the US is estimated at over $63 billion (2012 USD).