The purpose of this Department of Homeland Security (DHS) Science and Technology Directorate (S&T) Report on Alerting Tactics (Report) is to provide recommendations on effective combinations of alerting tactics for various incident types based upon lessons learned from practitioners. This report examines: ● Nationwide alert originator best practices for reaching communities; ● Effective combinations of current and emerging alerting tools and practices to improve overall public response; and ● Considerations for integrating future technologies (e.g. advanced sensor alerting) and technology platforms (e.g., Next Generation Television (Next Gen TV)) to address current alerting gaps and challenges.