USNS Comfort isn’t much of a help early on when you can just fly people to the United States mainland. Also there are hospitals in PR that just need supplies and generators.
If they are sending it now, it is going to be mainly for housing for relief workers and it will be anchored in the port.
USNS Comfort shines in countries outside the range of medical facilities without their own infrastructure. Countries like Yemen, Somalia etc..
Just an FYI.
For flying people to the US, Miami is 1000 miles away.
Houston 2000. Atlanta 1500.
If these people are on C130’s, Miami is 3 hours away, Houston 6 hours.