If you're booked on a Carnival cruise sailing from Texas, Louisiana, Florida or California this week, it's worth keeping an eye on your phone. The line has told passengers that eight of its ships could be affected by three weather systems currently churning in the Caribbean and off the US West Coast.

In a statement sent to guests on Wednesday afternoon and relayed by Brand Ambassador John Heald, Carnival said its Fleet Operations Center in Miami is tracking Tropical Storm Isaias, Tropical Storm Rachel and Tropical Depression Twenty-E. The company stressed that ships will always steer well clear of storms, but the systems' forecast tracks put several homeports and voyages on watch.

In the Gulf, Isaias is the one to watch. Sailing from Galveston, the Carnival Breeze, Carnival Dream and Carnival Jubilee could all be affected, though all three are continuing with their planned itineraries and are due back in Texas over the weekend. Further along the Gulf, the Carnival Liberty out of New Orleans and the Carnival Valor and Carnival Paradise out of Tampa are also on the watch list. They too are sticking to their original schedules, but Carnival cautioned that port closures remain possible even if the ships themselves are never in danger.

Out west, Rachel and Tropical Depression Twenty-E could touch the operations of the Carnival Firenze, Carnival Panorama and Carnival Radiance, all of which sail from Long Beach. Carnival says the homeport itself isn't expected to be affected at this time, but it's still asking passengers on those sailings to stay alert.

So what should you actually do if one of these ships is yours? Carnival's advice is simple: sign up for its text alerts by messaging CRUISE (278473), with separate codes for each ship so you only get updates relevant to your sailing. The company says its communications team will issue further updates in the coming days.

This is a good reminder of how hurricane-season cruising works. Even when a storm never comes near a ship, it can close ports, shuffle itineraries or delay a turnaround day, which matters most for anyone flying in to meet the boat. If your cruise departs in the next few days from Galveston, New Orleans, Tampa or Long Beach, build some slack into your travel plans, keep your booking reference handy and get those text alerts switched on before departure day rather than after. And if you're booking a Gulf or Mexican Riviera cruise between June and November generally, travel insurance that covers weather disruptions is a cheap bit of peace of mind.

For now, no itineraries have been changed — this is a watch-and-wait situation, not a cancellation. Carnival's message to guests is that safety comes first and the ships will keep their distance from all three systems.