When an emergency occurs, it is not always sufficient to simply initiate alarm bells. Individuals may not know what the alarm bell means and as a result may respond inappropriately to its sound. Many buildings have installed mass notification or emergency communication systems, based upon requirements provided in model codes and standards, that can be used to disseminate information in the event of an emergency. However, there is a lack of guidance on how to use current emergency communication systems in the most effective manner. As the use of newer technologies such as mobile devices or social networking tools grows, guidance on message content and dissemination becomes ever more critical for ensuring effective and safe response of building occupants during an emergency.