The entire island of Puerto Rico lost power again.
Officials from the island's electricity provider are blaming a defect in a power line. They say it could take up to 36 hours to fix.
Puerto Rico is still recovering from Hurricane Maria in September. Right before this major outage, about 40,000 people still didn't have electricity.
This is also the second major outage in less than a week. Crews were already trying to restore power for 870,000 people after a tree fell on a major power line last week.