 The lake has shorelines on western Mozambique, eastern Malawi, and southern Tanzania.The largest river flowing into it is the Ruhuhu River, and there is an outlet at its southern end, the Shire River, a tributary that flows into the very large Zambezi River in Mozambique.Evaporation accounts for more than 80% of the water loss from the lake, considerably more than the outflowing Shire River.