Yemen has been in a state of protracted conflict since 2015. 24.1 million people, 80% of the population, are in need of humanitarian assistance. Taking into account a range of variables that affect Yemeni’s access to basic needs and services, these scenarios consider developments that could have humanitarian consequences and impact on access to basic needs within Yemen throughout 2020. These scenarios are not attempts to predict the future. Rather, they describe situations that could occur in the coming 15 months and are designed to highlight the possible impacts and humanitarian consequences associated with each scenario. The aim is to support strategic planning, create awareness, and promote preparedness activities for policymakers and others working in Yemen. The timeframe is until December 2020 although the scenarios may remain valid some months longer.