Does destination of FMLA leave matter?

Q. We are an Illinois-based company and have an employee whose mother is very sick with cancer and in need of medical care at home. The employee is entitled to FMLA leave. The issue is that the mother lives in Hawaii and he has asked for leave starting next month. I don’t mean to be “cold,” but it sounds like a vacation from our bitter winter. Must we grant the leave for him to go to Hawaii? ...