Nearly half of Puerto Rico still without power after island-wide blackout

Nearly half of Puerto Rico remained without electricity Thursday morning following an island-wide blackout that left 1.4 million customers in the dark and disrupted service at hospitals, its international airport and hotels, according to the Associated Press.

The outage, which began Wednesday afternoon, also left more than 400,000 residents without water. By Thursday morning, power had been restored to 51% of customers, while water service resumed for 83% of the affected population, the AP reported.

The cause of the blackout remains under investigation as of Thursday.