Definition of an Emergency

A sudden, unexpected or unforeseen critical situation which could not have been predicted in advance and which demands the employee's immediate action; and the immediate action demanded necessitates the employee's absence from work to deal with the situation, otherwise risk or danger of serious damage to the employee's residence and/or risk or danger to the physical safety of the employee's immediate family members may result; and the situation must have occurred on the day for which leave is requested.
Family Medical Leave Act