The primary function of coastal wetlands in flood control is their ability to act as natural buffers, absorbing excess water and reducing the impacts of storm surges. These ecosystems store and slow down floodwaters, decreasing the risk of damage to coastal communities and infrastructure. Additionally, coastal wetlands provide critical habitat for various species, enhancing biodiversity while improving water quality through natural filtration processes. Protecting and restoring these wetlands is essential for maintaining their flood control functions and promoting resilience against rising sea levels and climate change impacts.