A Vox podcast from two days ago. It's a complicated situation. As Americans, as part of our compact with each other through the United States Constitution, have roles to play when our fellow Americans are impacted by disaster. More than that, we have a private responsibility to care for our neighbors.
If you'd like to give to relief efforts in Puerto Rico, you might want to consider Lutheran World Relief. It's an organization highly respected for its work and efficiency. Your money will be well spent.