1992 Atlantic hurricane season
In the Bahamas, Andrew brought high tides, hurricane-force winds, and tornadoes, which caused significant damage in the archipelago, especially on Cat Cays. At least 800 houses were destroyed and left damage to the transport, communications, water, sanitation, agriculture, and fishing sectors. Overall, Andrew caused four fatalities and $250 million in damage in the Bahamas. Throughout the southern portions of Florida, Andrew brought very high winds; a wind gust of was reported at a house in Perrine, Florida. High winds caused catastrophic damage in Florida, especially in Miami-Dade County, where approximately 117,000 houses were either severely damaged or destroyed. In the Everglades, 70,000 acres (280 km) of trees were knocked down and about 182 million fish were killed. Rainfall in Florida was moderate, peaking at in western Miami-Dade County. Significant damage to oil platforms was reported, with one company losing 13 platforms, had 104 structures damaged, and five drilling wells blown off course. In Louisiana, Andrew produced hurricane-force winds along its path, damaging 23,000 homes and destroying 985 homes and 1,951 mobile homes. An F3 tornado in St. John the Baptist Parish damaged or destroyed 163 structures. 17 fatalities were reported in Louisiana, six of which were drowning victims offshore. Elsewhere, the storm spawned at least 28 tornadoes, especially in Alabama, Georgia, and Mississippi. Overall, Andrew caused 65 fatalities and $27.3 billion (1992 USD) in damage, making it the eighth-costliest hurricane in U.S. history, behind Hurricane Katrina in 2005, Hurricane Ike in 2008, Hurricane Sandy in 2012, hurricanes Harvey, Irma, Maria in 2017, and Hurricane Florence in 2018.
In mid-September, a tropical low detached from a cold front and developed into Tropical Depression Four late on September 17, while located about east-northeast of Bermuda. Early on the following day, the depression intensified into Tropical Storm Bonnie. Due to light vertical wind shear, Bonnie quickly strengthened, and became a hurricane late on September 18. Further deepening occurred, and at 1800 UTC on September 21, Bonnie peaked as a Category 2 hurricane. Thereafter, Bonnie became nearly stationary for almost 24 hours. Satellite images indicated that the low-level center became exposed, indicating that Bonnie was significantly weakening while tracking southward. It is estimated that Bonnie weakened to a tropical storm by late on September 24. Bonnie further deteriorated to tropical depression status on September 26, but re-strengthened to a tropical storm later that day.
History of New Orleans
The situation worsened when levees on four of the city's canals were breached. Storm surge was funneled in via the Mississippi River Gulf Outlet, which breached in multiple places. This surge also filled the Industrial Canal which breached either from the surge or the effects of being hit by a loose barge (the ING 4727). The London Avenue Canal and the 17th Street Canal were breached by the elevated waters of Lake Pontchartrain. Some areas that initially seemed to suffer little from the storm found themselves flooded by rapidly rising water on August 30. As much as 80% of the city—parts of which are below sea level and much of which is only a few feet above—was flooded, with water reaching a depth of 25 feet (7.6 m) in some areas. Water levels were similar to those of the 1909 hurricane; but since many areas that were swamp or farmland in 1909 had become heavily settled, the effects were massively worse. The most recent estimates of the damage from the storm, by several insurance companies, are $10 to 25 billion, while the total economic loss from the disaster has been estimated at $100 billion. Hurricane Katrina surpassed Hurricane Andrew as the costliest hurricane in United States history.