An emergency notification system is provided. The emergency notification system comprises an emergency notification server (206), a signage server (202), digital signage displays (208); and a data communications network (134), wherein the emergency notification server (206) is configured to communicate with the signage server (202) via the data communications network (134) and wherein the emergency notification server (206) is configured to indicate if the emergency notification system (100) is in a non-emergency state or in an emergency state, and wherein the signage server (202) serves different data to the plurality of digital signage displays (208) depending on if the state of the emergency notification system (100) is in a non-emergency state or in an emergency state.