In 2014, Ferguson, Missouri experienced multiple waves of civil unrest in response to the fatal shooting of Michael Brown and the grand jury decision not to indict Darren Wilson, the police officer responsible for the shooting. During this time, the Ferguson Municipal Public Library served a crucial role in responding to this community crisis. The actions of this library supported Ferguson's community resilience by limiting the impact and helping residents respond, recover, and heal from the civil unrest. A content analysis of the library's tweets reveals how the library used Twitter to communicate with the public and support its resilience around both waves of civil unrest. This case study highlights the importance of library disaster planning, roles libraries can play in helping communities plan, respond, and recover from crises, and explores how a library can employ social media to communicate with patrons and support community resilience.