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A groundbreaking study has unveiled the extensive long-term impact of tropical cyclones on human mortality in the contiguous United States. While immediate fatalities and damage caused by hurricanes and tropical storms are well-documented, the research sheds light on the more elusive, delayed consequences of these natural disasters. The study analyzed data from all tropical cyclones that hit the US between 1930 and 2015.

The researchers discovered a significant rise in excess mortality that continues for up to 15 years following each storm. On average, a single tropical cyclone was found to cause between 7,000 and 11,000 additional deaths over time. This figure starkly contrasts with the 24 immediate deaths typically reported by government agencies.

By examining the effects of 501 historical tropical cyclones, the study found that these storms contribute to a previously unacknowledged mortality burden. Remarkably, this burden accounts for approximately 3.2-5.1% of all deaths along the Atlantic coast. The findings highlight the substantial influence of tropical cyclones on mortality rates, especially among vulnerable populations such as infants under the age of one, individuals aged 1-44, and the Black population.

The research suggests that understanding the mechanisms behind this excess mortality could offer significant health benefits. These revelations challenge the formerly held belief that the impact of tropical cyclones on public health was negligible, emphasizing the need for a more comprehensive assessment of the long-term risks associated with these natural disasters.