The year 2020 has been an unprecedented period when global challenges of migration, climate change, and the COVID-19 pandemic have collided. As a build-up to International Migrants Day, this weekly article series from the United Nations University Migration Network brings together UNU’s collaborative expertise to explore the interrelations and acute challenges of migration, climate change, and health. The series examines these connections at local and global levels, highlights the implications for migrants, and provides evidence-based insights for United Nations member states, governments, and policymakers.