The storm destroyed 85 percent of all the island's towers.
Rossello appeared with Homeland Security adviser Tom Bossert and Brock Long, administrator of the Federal Emergency Management Agency, adding the presence of those two top officials was "a clear indication that the administration is committed with Puerto Rico's recovery process".
With its airports and harbors severely damaged, as well as a number of major highways, Puerto Rico is more isolated than ever-making it all the more challenging for an island in urgent need of aid to provide for its most vulnerable residents, according to the report.
On Sunday, Jennifer Lopez joined NY governor Andrew Cuomo in a press conference announcing she was donating $1 million from the proceeds of her Las Vegas show to aid hurricane relief in Puerto Rico and the Caribbean. "There is going to be a hefty toll for us to make sure that we can reestablish normalcy and build Puerto Rico back stronger", the Governor said. It's Puerto Rico, they're American citizens.
On the mainland, power restoration is almost complete after Hurricane Irma hit Florida earlier in the month.
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He is scheduled on a flight on Monday 10/2 and will be traveling to Puerto Rico to assist with the relief effort.
Messages from Puerto Ricans sent since Wednesday's direct hit by Maria describe the destruction in apocalyptic terms.
"What's foremost in my mind and many others, is trying to figure out the best way to help", Lopez said. "The one thing that's clear is these people need a lot of help".
The Caribbean barely had time to recover from the devastation wrought by Hurricane Irma when Hurricane Maria made its way through the area.
Rey is from Carolina, Puerto Rico and all of his family is there. Delivering a message in both Spanish and English, J Lo remarked that in the aftermath of Category 5 Hurricane Maria ravaging Puerto Rico, the island needs our help.
First in Spanish and then in English, Lopez, 48, shared her announcement in a speech that was live-streamed on Twitter.
She called the hurricane "a catastrophe of historic proportions that will require coordination at all levels of government".