It is a US Territory and thus they are citizens of the United States.
So, Yes.
Far more important is they are human beings.
No one is helping Cuba and there's no excuse for that.
Interestingly, the US Virgin Islands have gotten much more than PR has. BUT, they are several very small islands, with a total population of about 100K. Fewer of them and easier to get to but they got help much faster. Why?
BTW, pino trump has property on the island of Vieques. We still haven't heard from our friend there. We got an email from his wife, who was already in NY. She cannot get home and has no way of finding out if her husband is dead or alive.