When Sandy hit the east coast of the U.S., the American Red Cross used social data to direct efforts and engage with affected communities from their crisis response centre. When the floods hit Brisbane, the city council was prepared to engage at scale, and used social channels to overcome limitations of stressed physical infrastructure. To rebuild Christchurch the city needed to create a response at social speed. When disasters strike, people turn to social media to get answers and help. During this session, we will analyze how the American Red Cross, City Council of Brisbane and City of Christchurch were able to leverage social media channels effectively to respond to and address the needs of their communities.