According to CNN, there are still more than 450,000 Puerto Ricans without power four months after Hurricane Maria hit the island.

The news came after the Puerto Rico Electric Power Authority (PREPA) announced a "major milestone" this week, confirming that 1 million Puerto Ricans have had their electricity restored.

While this achievement was feted, PREPA's interim executive director Justo Gonzalez said that those that lack power have not been forgotten.

"We still have several hundred thousand residents and business owners who remain without power, which is unacceptable," Gonzalez said. 

According to the local government, 68.25 percent of PREPA's customers currently have power.

A PREPA statement said that the company is cooperating with state and federal agencies, such as US Army Corps of Engineers, FEMA and power industry contractors, "to execute an aggressive plan to advance the restoration."

Colonel John Lloyd of the Army Corps of Engineers promised the Army "will continue to press forward until the mission is complete," according to ABC News.

The island territory has struggled to recover from the storm. Currently 170 of the island's 3.5 million residents remain housed in emergency shelters, and another 900 are living in hotels.