Leaders of an Indigenous community near London, Ont., are calling for the federal government to work with them to help solve chronic water supply problems after a state of emergency was issued Tuesday due to low water levels. Residents of Oneida Nation of the Thames are under an order to conserve water and limit its use with the community's water tower at an all-time low. The tower is the primary source of water for the 546 homes and 22 buildings in the territory.