The term "rising seas" refers to the long-term increase in sea levels due to various factors such as global warming, melting glaciers and ice sheets, and thermal expansion. This phenomenon is caused by an increase in ocean temperatures which causes water molecules to expand and take up more space, thus causing a rise in sea level. The rising seas can have significant impacts on coastal communities, including increased flooding during storm surges or high tides, erosion of shorelines, damage to infrastructure such as roads and buildings, and loss of land for agriculture or other purposes. It is an issue that requires attention and action from governments, scientists, and the global community in order to mitigate its effects and adapt to changing conditions.