The American Red Cross leverages open data in many ways for long term programs and during disaster responses. Most recently during Typhoon Haiyan in the Philippines thousands of volunteer mappers made millions of edits to OpenStreetMap in the affected areas of the Philippines to support humanitarians such as the Red Cross on the ground. This session will look at the mechanics of how the American Red Cross uses the great work of digital volunteers to empower its relief teams on the ground to navigate, plan, and make life changing decisions.