Markets are a crucial component of how people survive. Understanding how markets are disrupted in emergencies is critical to any analysis of hunger, and to food and livelihood security. The Emergency Market Mapping and Analysis Toolkit (EMMA) is a guidance manual to assist front-line staff to make rapid assessments of market systems in the first few weeks of a crisis. Its purpose is to improve early response planning so that resources are used effectively, and so that opportunities are not missed to bolster future recovery in the local economy. This toolkit can help prevent lasting damage to the livelihoods, jobs and businesses on which people's long-term security depends through practical steps to understand the important market aspects of an emergency situation, and communicate this knowledge promptly and effectively to decision-makers. Also available in French.