As the number of extreme weather events has doubled over the past 20 years, from 200 to more than 400 a year, this seminar looks holistically at the role of sudden-onset disasters (storms, floods) as well as slow-onset environmental changes (desertification, droughts, land degradation, water scarcity) in propelling both internal and international migration. Spanning the responsibilities of a range of actors and fields of intervention– from humanitarian assistance and disaster preparedness to climate change adaptation and sustainable development– the linkages between migration and the environment need to be better understood and mainstreamed into existing assessment and strategic planning tools.