Power outages are a frustratingly frequent occurrence for many Puerto Ricans. A string of blackouts during the summer prompted protests and a state of emergency.

Over a million people were without power in Puerto Rico after rolling blackouts knocked out electricity for more than 80% of electric customers on Tuesday morning. At 5:30 a.m. local time, Puerto Rico's power company began working to restore power to the island.

A “massive blackout” that hit much of Puerto Rico early Tuesday may keep the U.S. territory in the dark through New Year’s Eve and beyond, according to the governor and the private energy company that provides power to the island.