How are they different? – CornellALERT messages are emergency notifications sent to the Cornell community any time there is an imminent threat to the health or safety of the community. This could include dangerous weather conditions, such as a tornado warning; the threat or presence of an explosive device or another active threat; or other emergencies that warrant a change in the university’s operating status. You receive CornellALERT emergency messages via email and on the mobile phone number listed in your Cornell personal contact information. I also encourage you to download RAVE Guardian, a free mobile app that turns your smartphone into a personal safety device.