Leadership in crisis response has traditionally been strongly centralized and hierarchical. Top-down command and control is popular, because a strict hierarchy and clear lines of command enable rapid decision-making and coordinated actions. Critics, however, have argued that centralization is both impossible and undesirable during crises, because leaders lack situational awareness and cannot control frontline responders from a distance. They argue that operational personnel should take charge to ensure an adaptive frontline response, potentially at the cost of efficiency and speed. The operational dilemma of crisis leadership revolves therefore around the tension between centralization and decentralization. To deal with this dilemma, it is useful to study how influence is exercised and power circulates during crises. Rather than a static authority structure, different types and phases of crises require different forms of leadership. Authority structures have to be tested and adjusted throughout the response, so they can be continuously co-constructed by frontline responders and operational leaders, as the complex and dynamic crisis situation evolves.