American travel to Cuba, which boomed after a détente between the two countries in late 2014, was already beginning to suffer after President Donald Trump in June announced a more restrictive policy toward the government of Raúl Castro.

The new rules turned the clock back to the days before the 2014 détente, restricting American travel to Cuba in the “people-to-people” category to organized groups, making visits more costly and choreographed. The restrictions will also put some hotels and restaurants run by the Cuban military off limits.

Since then, fewer individuals have been visiting the island, travel representatives said, though interest from large groups has remained about the same. Even before the sonic attacks, travel to Cuba could be confusing. Regulations shift back and forth, depending on who is in the White House. Michael Sykes, president of Cuba Cultural Travel, said many travelers were “misinterpreting” the State Department warning to mean that Cuba was prohibited or that they would not be able to get a visa.

Here are some answers to common questions about how to travel to Cuba now:

Can Americans still travel to Cuba?

Yes. The State Department issues advisories about travel to different countries all the time. While citizens should always take warnings on board and read them in detail, they are not binding. The advisory is likely to be updated once the mystery behind the sonic attacks is solved.

What if I need help when I am in Cuba?

The State Department has said that, because of a reduction in personnel in Havana, it will be able to help Americans only in emergencies. The government provides emergency telephone numbers and information here.

Will damage from Hurricane Irma affect my trip?

It should not. While parts of Cuba were hit hard by the storm, including tourist areas like the northern keys and Varadero, the areas generally visited by Americans were not. And although Havana was badly flooded, tourist infrastructure is back to normal.