The Mermentau Watershed (HUC 08080202) covers an area of approximately 1,618 square miles in southwestern Louisiana, including parts of Acadia, Cameron, Jefferson Davis, and Vermilion Parishes. The watershed is primarily an agricultural area, with rice being the dominant crop. The hydrology of the watershed is influenced by the Gulf of Mexico, with high rainfall and occasional hurricanes causing flood events. The watershed contains several small reservoirs used for irrigation, but there are no major surface water sources. The area experiences a humid subtropical climate, with hot summers and mild winters. Snow is rare in the region, with only a few instances of light snowfall every few years. The region is also prone to frequent thunderstorms and tornadoes. Climate change is expected to increase the frequency and intensity of extreme weather events, including floods and droughts, which will impact the watershed's agricultural industry.