The Puerto Rico dam that was severely weakened by Hurricane Maria teetered on the brink of collapse Monday, as residents endured another day without power and dwindling food and water.

Gov. Ricardo Rosselló warned of a “humanitarian crisis” if Congress doesn’t soon approve an aid package for the US territory.

“We need something tangible, a bill that actually answers to our need right now,” he told CNN.

A collapse of the earthen Guajataca Dam in the northwest part of the island could trigger a flood that would threaten the lives of tens of thousands of people.

“Some of the dam has fallen apart,” Rosselló said. “Now we are making sure that we can assess if the other part will fall down, as well. It represents a great danger for about an estimated 70,000 people.”

With 91 percent of cellphone sites out of service, authorities went door-to-door, warning people of the potential dam collapse.

“My action has been to order evacuation,” the governor said. “I’d rather be wrong on that front than do nothing and having it fail and costing people their lives.”

It’s been nearly a week since Hurricane Maria directly hit the island as a Category 4 storm, and residents were still struggling to access basic supplies such as clean drinking water and gas.

“The devastation in Puerto Rico has set us back nearly 20 to 30 years,” Puerto Rico Resident Commissioner Jenniffer Gonzalez told CBS News.

“The destruction of properties, of flattened structures, of families without homes, of debris everywhere. The island’s greenery is gone.”

House Speaker Paul Ryan on Monday pledged his support for the island, which is also in the midst of a $73 billion debt crisis.

“The stories and images coming out of Puerto Rico are devastating,” he said.

An aerial photo revealed a plea scrawled large letters on in the coastal town of Punta Santiago.

“S.O.S. We need water/food!!” it read in Spanish.

And the National Oceanic and Atmospheric Administration released nighttime satellite images taken before and after the storm, with the later photo showing the powerless island in darkness.

Puerto Rican officials have confirmed at least 10 storm-related deaths on the island, and Maria was blamed for at least 19 other fatalities across the Caribbean.

Metro Puerto Rico columnist Armando Valdés described finding a “heartbreaking” situation at a 14-story nursing home for low-income people in San Juan.

“Without food and an impossible climb down for most residents, some folks we spoke to couldn’t remember when they had last eaten,” he wrote in a statement posted on Twitter.

“They had no drinking water. The ground-floor public restroom that was being used by many residents — it had some water being on the lowest level — was a putrid mess.”

At the Puerto Rico Medical Center in San Juan, the island’s largest public hospital, an official said help was badly needed.

“If this is not taken care of, people are going to start dying,” said Dr. Juan Carlos Sotomonte, a director of the cardiovascular unit.

Hundreds of stranded travelers filled the stifling halls of San Juan Airport Monday, anxious to learn when they could leave.

A nurse from Little Rock, Ark., told CBS News that they were in dire need of food, water and fans.

“It’s inhumane,” she said.

More celebs, meanwhile, were donating to relief efforts. Rapper Daddy Yankee said he gave $1 million to Feed America and another $1 million to the Red Cross.

“I have my family there” he told CNN. “I have my wife, my daughter, and I live there still . . . and we really need your help.”

With Wire Services