Puerto Rico's electricity customers went an average of 36 hours without power in 2025 from interruptions outside major events, 19% more than in 2024, according to the US Energy Information Administration. Across the 2021-2025 period, Puerto Rican customers lost power for an average of 29 hours a year outside major events, compared with about two hours a year for customers on the US mainland.
The length of these non-major-event interruptions in Puerto Rico has increased since 2023.
Major events added another 23 hours of outages in 2025. The EIA defines a major event day as one where the average outage duration exceeds a threshold set from the system's own data over the previous five years, separating routine grid operations from days disrupted by events beyond the utility's normal operating conditions, including severe weather, vegetation interference with power lines, and some utility practices.
No major hurricanes hit Puerto Rico directly in 2025. Heavy rainfall and flooding between April and May contributed to the major-event total, along with Hurricane Erin, which did not make a direct hit but brought tropical storm-force winds, landslides and downed trees that affected the island's grid.
Interruption frequency outside major events has doubled in Puerto Rico since 2021 and rose 13% between 2024 and 2025.
- 36 hours: average non-major-event outage time per customer in 2025, up 19% from 2024
- 29 hours: average annual non-major-event outage time, 2021-2025
- 23 hours: added outage time from major events in 2025
- Almost 16: average non-major-event interruptions per customer in 2025
- About 17: average interruptions per customer for 2025 including major events
