A recent study published in The BMJ’s climate issue has shed light on the broader health impacts of tropical cyclones, beyond the direct physical injuries they cause. The study found that exposure to tropical cyclones is linked to higher risks of death across various causes such as kidney, heart, and lung diseases, neuropsychiatric conditions, and diabetes.
Researchers analyzed death records from 1,356 communities in nine countries and territories over a 20-year period to assess the relationship between tropical cyclone exposure and mortality risks. The study included 14.9 million deaths and 217 tropical cyclone events, revealing that risks of death increased significantly following tropical cyclones, with peaks occurring within the first two weeks after exposure.
The findings showed that the highest increases in deaths were associated with kidney diseases and injuries, while more modest risks were observed for diabetes, neuropsychiatric disorders, infectious diseases, digestive diseases, respiratory diseases, cardiovascular diseases, and neoplasms. These elevated mortality risks are attributed to disrupted healthcare services, limited access to medications, and increased physical and psychological stress following tropical cyclones.
Notably, the study highlighted that risks of death were higher in deprived communities and areas with less historical exposure to tropical cyclones. Rainfall from tropical cyclones was found to be more strongly associated with death than windspeed, emphasizing the importance of including rainfall in early warning systems.
While the study is observational and cannot establish causation, the researchers stress the need to integrate more evidence on tropical cyclone epidemiology into disaster response strategies. With tropical cyclones intensifying due to climate change, the researchers urge policymakers to develop cyclone-specific health policies to protect vulnerable populations and build resilience against the direct and indirect health impacts of these extreme weather events.
In conclusion, the study underscores the critical importance of addressing the indirect health effects of tropical cyclones and calls for immediate action to mitigate the growing risks posed by these devastating natural disasters. The findings provide valuable insights for developing strategies to protect public health in the face of increasing tropical cyclone activity under a warming climate.
