Simon Griffiths, the evaluation and research practice lead for the international development practice of Coffey, A Tetra Tech Company (Tetra Tech), reflects on Tetra Tech’s emerging approach to measuring urban resilience in humanitarian and urban settings. Focusing on Somalia, he looks at the importance of understanding and measuring social capital in building resilience among people who have migrated to urban areas due to drought and within the communities that host them in the short and long term. All opinions expressed in this post are the author’s own.