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Facts + Statistics: Hurricanes
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The official Atlantic hurricane season runs from June through November, but occasionally storms form outside those months. Seasonal hurricane forecasting from Colorado State University is available here.
According to the National Oceanic and Atmospheric Administration, a tropical cyclone is a rotating low-pressure weather system that has organized thunderstorms but no fronts, Hurricanes are tropical cyclones that have sustained winds of 74 mph. At this point a hurricane reaches Category 1 on the Saffir-Simpson Hurricane Wind Scale, which ranges from 1 to 5, based on the hurricane's intensity at the time of landfall at the location experiencing the strongest winds. The scale provides examples of the type of damage and impacts in the United States associated with winds of the indicated intensity. It does not address the potential for other hurricane-related phenomena such as storm surge, rainfall-induced floods and tornadoes.
Costliest U.S. Hurricanes
The chart below shows insured losses in dollars for the top 10 costliest hurricanes in the United States when they occurred and in 2023 dollars adjusted for inflation. According to Aon, Katrina was the costliest hurricane on record, causing $65 billion in insured losses in 2005, including losses from the National Flood Insurance Program (NFIP). Losses from Katrina totaled $101.9 billion in 2023 dollars.
Top 10 Costliest Hurricanes In The United States (1)
($ millions)
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(1) Includes Puerto Rico and the U.S. Virgin Islands and losses sustained by private insurers and government-sponsored programs such as the National Flood Insurance Program. Includes hurricanes that occurred through 2023. Subject to change as loss estimates are further developed. As of January 2024. Ranked on insured losses in 2023 dollars.
(2) Adjusted for inflation by Aon using the U.S. Consumer Price Index.
Source: Aon.
Hurricanes And Related Deaths In The United States, 2000-2022 (1)
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(1) Data is at the time of initial reporting for each respective year. An accurate death toll may be unknown at time of initial reporting.
(2) Atlantic Basin.
(3) Includes fatalities from high winds of less than hurricane force from tropical storms.
(4) Includes one hurricane (Hanna) which made landfall as a tropical storm.
(5) Hurricane Ida, which made landfall as a tropical storm.
(6) Excludes Hurricane Sandy which made landfall as a post-tropical storm.
(7) On August 28, 2018, the Puerto Rico Government revised the official death toll from Hurricane Maria to 2,975 deaths based on independent research conducted by George Washington University.
(8) All fatalities in 2019 are from storms that did not make landfall in the United States.
(9) Excludes Hurricane Bonnie which did not reach hurricane status in the Atlantic.
Source: Insurance Information Institute from data supplied by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Hurricane Center.
Top 10 Most Significant Flood Events By National Flood Insurance Program Payouts (1)
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(1) Includes events from 1978 to December 31, 2023 as of January 2024. Defined by the National Flood Insurance Program as an event that produces at least 1,500 paid losses. Ranked on Amount Paid in 2023 dollars.
Source: Federal Emergency Management Agency (FEMA) National Flood Insurance Program (NFIP) data; analysis courtesy of Aon.
U.S. Storm Surge Risk, Gulf and Atlantic States, 2024
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(1) The risk categories are cumulative and increase in value from Category 1 to Category 5. Category 1 represents the higher risk of damage from a weak hurricane; Category 5 includes Categories 1 to 4 and the low risk of damage from a Category 5 hurricane.
(2) Combines materials, equipment and labor, but does not include the value of the land or lot.
Source: CoreLogic®, a property data and analytics company. May not be re-sold, republished or licensed to any other source without prior written permission from CoreLogic.
U.S. Hurricane Wind Risk, Gulf and Atlantic States, 2024
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(1) The risk categories are cumulative and increase in value from extreme to moderate or greater. The moderate or greater wind risk level encompasses all four wind risk levels.
(2) Combines materials, equipment and labor, but does not include the value of the land or lot.
Source: CoreLogic®, a property data and analytics company. May not be re-sold, republished or licensed to any other source without prior written permission from CoreLogic.
Top Metropolitan Areas At Risk for Storm Surge and Hurricane Wind, 2024
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(1) The Miami, New York and Houston metro areas studied in this analysis are defined by the Core Based Statistical Areas (CBSAs) of that region. In Miami, this includes the Miami-Fort Lauderdale-Pompano Beach, FL area; in New York City, this includes the New York City-Newark-Jersey City, NY-NJ-PA area; in Houston, this includes Houston-The Woodlands-Sugarland, TX.
(2) Combines materials, equipment and labor, but does not include the value of the land or lot.
Source: CoreLogic®, a property data and analytics company.
