The COP29 Declaration on Water for Climate Action will launch the Baku Dialogue on Water for Climate Action (Baku Dialogue) to serve as a COP-to-COP collaboration platform fostering continuity and coherence on water-related climate action, ensuring a consistent focus on water and its interplay with climate change, biodiversity loss, pollution, and desertification, focusing on actions at the international, regional, river and basin levels. The Baku Dialogue will serve to strengthen COP-to-COP synergies and facilitate continuous and coherent engagement across COPs on water-related processes of the UN Framework Convention on Climate Change and the Paris Agreement, the Convention on Biological Diversity and the UN Convention to Combat Desertification, ensuring that water is systematically addressed in climate, biodiversity, and desertification agendas.