The publication ‘Water, Megacities and Global Change’ stems from the EauMega2015 Conference, organized at UNESCO Headquarters in December 2015 during COP21, which played a pivotal role in showcasing the significance of Megacities in the achievement of the Sustainable Development Goals, especially Goal 6 of the 2030 Agenda, pertaining to universal access to water and sanitation. This second edition of the publication introduces the water portrait of yet another emblematic megacity – Kinshasa, the capital and the largest city of the Democratic Republic of the Congo. It overall presents 16 emblematic cities and their water-related challenges as well as solutions they integrate to adopt a more sustainable path of development. The publication is one of the outputs of EauMega 2015 and calls for general mobilization to devise the sustainable urban policies the world needs.