This study contributes to ongoing attempts by scholars to understand the many ways that social media is being used by disaster and crisis response actors. We present a case study consisting of emergency response organizations, government agencies, local government, non-government organizations, community groups and platform-based actors, and focus specifically on how social media is used in this context to support the information needs of vulnerable groups. We examine how tension between the

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... sence of top-down, generic information and the need for contextualized and specific information is resolved, and the translation processes that occur between the range of actors. We also offer recommendations for future research to address the disproportionate impacts of disasters and crises on vulnerable groups.