I see how one can become worried with the storms in the Atlantic. But I hear it is quite safe to be in a cruise ship. That is because the captain will be aware of the storms out there and is capable keeping the ship clear of them. Although, the seas might be rougher than usuall. And the intinerary might be subject to change without notice, depending on where the storms might be.
For me, I always cruise in November. So the likely hood of bad storms (hurricanes, tropical storms, etc.) is low during that time.