A levee is a raised structure, often made of earth or concrete, built along the banks of rivers or lakes to prevent flooding. By holding back water, levees help protect nearby communities, farmland, and infrastructure from the damaging effects of high water levels. They are especially important in areas prone to heavy rainfall or snowmelt, where rivers can overflow their banks. Levees can vary in size and design, depending on the specific needs of the area they protect. In some cases, they are part of a larger flood control system that includes dams, floodgates, and drainage channels. Proper maintenance of levees is crucial to ensure their effectiveness during extreme weather events.