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Sunday, October 11, 2026 · UTC
Puerto Rico

LUMA Energy triggers island-wide blackouts as reserve falls to 1 megawatt

On Sept. 12, the grid held 1 MW of operational reserve at 6:30 p.m., LUMA Energy said.

Yadiel Rosario Quiñones
Grid and Infrastructure Reporter
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LUMA Energy activated selective blackouts across every region of Puerto Rico on Sept. 12, 2026, after the grid's operational reserve dropped to 1 megawatt at 6:30 p.m. [1]