Measuring and mitigating risk: preventing protracted emergencies from becoming the new norm. On 4 December 2018, Humanitarian Chief Mark Lowcock jointly launched the Global Humanitarian Overview (GHO) 2019 and the World Humanitarian data and Trends (WHDT) 2018 report. The GHO is the most comprehensive, authoritative and evidence-based assessment of world humanitarian needs. WHDT focuses on trends and opportunities in humanitarian action. This 2018 Global Humanitarian Overview (GHO) therefore provides and analysis not just of how many people need humanitarian assistance, but a clear understanding of why.