Be aware of the following indicators of distress. Look for grouping, frequency, duration, and severity of these behaviors, not just isolated symptoms.
If you think the student may disclose to you an unreported sexual assault, self harm, or potential harm to others, state up front that you are obligated to report any information and refer them to their counselor.
If a student expresses a direct threat to self or others, or acts in a bizarre, highly irrational and disruptive way, escort the student to the administration office or the counseling office immediately.