The aim of this article is to provide a systematic review of peer-reviewed literature on leadership tasks and effectiveness of mayors and governors during drastic collective events. A total of 34 peer-reviewed articles met our criteria. They were analysed using the theoretical framework by Boin on leadership tasks, i.e., sense making, decision making, meaning making, terminating, and learning. Studies ranged from minor incidents like local riots, to the events of 9/11 and Hurricane Katrina. The material turned out to be dominated by Western and American studies.