Effective communication is critical in all emergency situations!  The Incident Commander and/or Senior Director Environmental Health and Public Safety are responsible for directing all communications activities during an emergency/disaster response.  Purdue ALERT, the Emergency Warning Notification System will be activated based on the incident level and Incident Commander decision.  Purdue ALERT is a multilayered communications approach and is made up of numerous systems/processes to include all-hazards outdoor warning sirens, text messages, email, Purdue Campus Emergency Status webpage, Alertus Beacons & Desktop Popup Alerts, over 120 Digital Signs, TV/radio and more.