With Hurricane Irma potentially heading to South Florida and key destinations in the Caribbean, cruise lines are scrambling to make changes to itineraries and have also cancelled a handful of sailings.

Norwegian Cruise Line has axed the Sept. 8 sailing aboard the Norwegian Sky. Guests get a full refund, plus a 50 percent future cruise credit.

The Norwegian Escape’s week-long Sept. 9 voyage from Miami is also cancelled. Guests get a full refund, plus a 50 percent future cruise credit.

For the Escape’s current Sept. 2 sailing, the ship will be returning to Miami on Thursday.

“Those guests who are residents of South Florida, who drove to PortMiami or who have travel plans already confirmed that will return them safely home by Friday afternoon may disembark the ship on Thursday if they wish to do so. For those guests who did not drive to PortMiami and are unable to secure a flight back home, we strongly encourage them to stay onboard the ship,” said Norwegian in a prepared statement.

Norwegian Escape will set sail from Miami on Thursday evening on a course away from the storm. While we are unable to confirm at this time when and where the ship will return to port, we welcome all guests to remain onboard to stay safe and secure.”

Royal Caribbean has employed similar tactics, and has cancelled the September 8 sailings on the Majesty and Enchantment of the Seas. Guests will receive a full refund and 25 percent future cruise credit.

Royal Caribbean said it will provide an end-of-day update on Tuesday regarding sailings aboard the Allure, Anthem, Empress, Harmony and Oasis.

The cancelled sailings will impact third quarter earnings.