Unfortunately, not without incurring a penalty or incurring additional costs. The best thing to do is to be as patient as possible until the cruise line has made a formal announcement.
By the time its determined that a hurricane will be affecting the departure of a specific cruise, all of the reservations for that date will probably be in a 100 percent cancellation penalty period with the cruise line. That means that any voluntary cancellation on the part of the guest, for any reason whatsoever, will be penalized.
In addition, the cruise line treats a request to postpone or reschedule a reservation as a cancellation of the original booking, and it will be subject to the cancellation penalty. Plus, a new booking must be made at whatever rate is applicable at the time so you may have to pay more for the very same cruise.