JOHN YANG:

Almost a week after Maria hit, some isolated towns still have not been heard from at all. It's in those places, cut off from the rest of the island and the world, where some fear the worst damage and loss of life.

And there is still danger elsewhere: Officials said a dam on the Guajataca River remained in danger of failing. About 70,000 people could be in danger and have been urged to evacuate. Much of Puerto Rico's economy is in shambles; 80 percent of its agricultural crops were wiped out, a calamity for a territory that was in fiscal crisis even before Maria.

National Guard planes are delivering sorely need supplies, but there are calls for much more.

Today, House Democratic leader Nancy Pelosi urged President Trump to deploy the military for search-and-rescue, maintaining order and providing transportation. House Speaker Paul Ryan vowed Puerto Ricans will have what they need. And to encourage private giving, the five living former presidents expanded their one-America appeal to include Puerto Rico and the U.S. Virgin Islands.

For more on the situation in Puerto Rico, I spoke with the territory's governor, Ricardo Rossello.

Governor Rossello, thanks for joining us.

Let me first by asking you, what's the latest on the Guajataca Dam? Is that still in that danger, or has that stabilized?