 In 2016, the Chehalis River Basin Flood Authority authorized $55,000 to be used to collect data, geography, and history on the flooding in the city, which reports indicated to be affecting approximately 35 homes and causing on average three road closures per event, with this flooding occurring typically twice a year.To its north, Oakville is bordered by the hills of the Capitol State Forest.The area is filled with hills, valleys, rivers, and dense forests.