LUMA said the exact cause of the power outage, which began at 5:30 a.m. local time, remains under investigation.

The outage, coinciding with New Year's Eve, has disrupted travel plans and daily life, affecting 80 percent of the population.

Efforts are already underway to restore service using the San Juan and Palo Seco power plants. We are demanding answers and solutions." Josué Colón, director of the Puerto Rico Electric Power ...