FILE - In this Oct. 14, 2017 file photo, what was once the home Arden Dragoni and his family lies in ruins after the passing of Hurricane Maria in Toa Baja, Puerto Rico. The Dragoni family lost everything on Sept. 20: clothes, household goods, and an old car, as well as the family's source of income: Arden Dragoni's construction work. (AP Photo/Ramon Espinosa, File)

SAN JUAN, Puerto Rico - Housing is urgently needed for tens of thousands of Puerto Ricans who lack power and a regular source of safe water nearly three months after Hurricane Maria damaged their homes, Refugees International says in a report.

The non-profit group visited the U.S. territory in recent weeks to survey needs and review the response by local and federal officials in the aftermath of the Category 4 storm, marking the first time it has organized a mission to a U.S. jurisdiction. In a report shared with The Associated Press, the group said its team was shocked by poor co-ordination and logistics across the island that have caused delays in aid. It noted the island is still in emergency mode and requires more help.

"There was a failure of leadership and a failure to appreciate the magnitude of the situation and the need for extraordinary action by U.S. officials," Eric Schwartz, the group's president and a former U.S. assistant secretary of state for population, refugees and migration, said in a phone interview. "These people are our fellow Americans. The response of the federal authorities should have been and should be much stronger than it was and much stronger than it is."

Officials with the U.S. Federal Emergency Management Agency did not return a request for comment Sunday.

Puerto Rico is still struggling to recover from the Sept. 20 storm that killed dozens of people and caused up to an estimated $95 billion in damage during a 12-hour rampage across the island with winds of up to 154 mph. Power generation is currently at 69 per cent of normal, and 5 per cent of utility customers still don't have water service. Nearly 600 people remain in shelters, and more than 130,000 have left for the U.S. mainland.

Those who remain behind face a lack of supplies and problems including limited access to tarps and a delayed response to requests for financial assistance, the report said.

"Compared to international disaster settings, I couldn't believe how slow the response was two months later," said Alice Thomas, climate displacement program manager for Refugees International who visited Puerto Rico.

She called for an improved strategy for delivering aid. "It has to happen now. There is still an emergency going on," she said.

The report noted that it took five days before any senior U.S. officials visited Puerto Rico after the storm, and the non-profit called for better co-ordination between local and federal agencies and a more aggressive plan to find adequate housing for those displaced by the hurricane. It said many people were unable to file claims in the first few weeks because they couldn't access the internet and then had problems awaiting home inspections because phone service was so spotty.

The report comes just days after a United Nations expert on extreme poverty and human rights visited Puerto Rico to assess needs and damage, marking the first time such an envoy has visited the U.S. territory in recent history.

News from © The Associated Press, 2017