A repeat of the catastrophic 1926 Great Miami Hurricane could cause more than $280 billion in economic losses if a similar storm struck South Florida today, according to catastrophe modelling cited by Yale Climate Connections.
The Category 4 hurricane struck South Florida on September 18, 1926, with its eye passing over downtown Miami and Miami Beach. The storm killed about 220 people in southeastern Florida, injured more than 6,000 and destroyed thousands of homes and buildings. It also contributed to the collapse of Florida’s 1920s land boom and triggered a severe economic downturn in Miami.
The hurricane caused an estimated $105 million in damage at the time, equivalent to about $2 billion in 2026 dollars. However, Miami-Dade County has changed dramatically since then. Its population increased roughly 23-fold between 1926 and 2022, while the number of housing units grew by about 41 times.
A 2026 study that adjusted historical hurricane losses for changes in population, housing and wealth estimated that if the 1926 storm had struck South Florida in 2023, it could have caused about $218 billion in damage in the region. The estimate also included about $25 billion in additional damage from the storm’s second landfall near the Florida-Alabama border.
However, researchers note that such historical adjustments do not capture every factor affecting modern hurricane losses. Stronger building codes and major improvements in hurricane forecasting could reduce damage compared with 1926, while the growth of highly urbanised coastal areas and climate-related changes could increase it.
Sea-level rise is one important factor. The Miami tide gauge has recorded an increase of about 1.12 feet in sea level since 1931. As a result, a storm tide comparable to the roughly nine-foot level observed during the 1926 hurricane could reach more than 10 feet under present conditions.
Modelling by Verisk Catastrophe and Risk Solutions estimated that a repeat of the 1926 hurricane occurring under today’s conditions could produce about $230 billion in gross insured losses across the United States, with more than $220 billion of those losses occurring in Florida. The model also estimated another $50 billion in potentially insurable but uninsured losses.
The figure does not include losses that could be covered by the National Flood Insurance Program or damage to public infrastructure such as roads, bridges and utilities. Total economic losses could therefore be considerably higher than the $280 billion estimate.
Other modelling efforts have produced similarly large figures. A 2025 Moody’s study estimated that a Category 5 hurricane striking just south of Miami could cause about $232 billion in total losses, while Karen Clark & Co. estimated in 2019 that a Category 5 Miami hurricane could result in about $200 billion in insured residential property losses alone.
Climate change could further affect the scale of losses. Warmer air can hold more moisture, increasing rainfall from hurricanes, while slower-moving storms can remain over an area for longer. Higher sea levels can also worsen storm surge and increase the risk of compound flooding when heavy rainfall occurs alongside coastal inundation.
The financial consequences could extend well beyond physical destruction. A major hurricane could increase insurance premiums, reduce property values, disrupt tourism and place pressure on banks and municipal finances. Moody’s modelling of a severe Category 5 Miami hurricane estimated that insurance premiums could rise by about 60% above recent levels within five years and potentially approach three times recent prices by 2036.
The 1926 hurricane demonstrated how a major storm can reshape South Florida’s economy. Modern modelling suggests that a comparable disaster today would occur in a far more densely populated and economically valuable region, potentially creating consequences that extend across Florida’s housing, insurance and financial sectors.
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