# Puerto Rico power grid strain and regulatory scrutiny > Live situation record from CLSTR: https://clstr.news/situations/puerto-rico-power-grid-maintenance > Updated: 2026-09-19T18:06:57.000Z. Sources: 34. Developments: 11. The Puerto Rico power grid continues to face operational instability and legislative pressure. On August 30, 2026, a sudden failure at the Costa Sur power plant in Guayanilla, involving the abrupt shutdown of units 5 and 6, left more than 197,000 customers without electricity. LUMA Energy reported that emergency load shedding was required to prevent a total grid collapse. While the public has criticized LUMA Energy for instability, the company has attributed the outage to generation deficiencies managed by the Puerto Rico Electric Power Authority (AEE) and other private generators. On September 11, 2026, continued instability followed the unexpected operational failure of Unit 5 at the Costa Sur plant, affecting a peak of over 126,000 customers. The island faces a structural generation deficit estimated between 700 and 850 megawatts. By September 13, 2026, the generation deficit reached a critical level, leaving over 150,000 customers without power due to technical failures at several plants, including steam leaks and valve repairs at Costa Sur and outages at AES Puerto Rico. On September 19, 2026, the Puerto Rico Energy Bureau (NEPR) intensified regulatory scrutiny by ordering LUMA Energy and Genera PR to attend a technical conference on September 28 to address a proposed six-cent electricity rate increase. The NEPR has demanded detailed data by September 22 regarding fuel costs, transmission interruptions, and unplanned outages. The inquiry specifically targets transparency in natural gas supply requests made by Genera to Naturgy and New Fortress Energy, including the economic impact of any supply reductions and instances where gas-capable units were forced to use alternative fuels between June and August 2026. ## Claims - CGE activated preventive electricity supply plans in Chile's Coquimbo and Atacama regions due to weather threats. (corroborated by 2 sources) - Illegal electrical connections caused a fatal electrocution in Presidencia Roque Sáenz Peña. (single source) - Secheep warned that continued illegal connections could cause further tragedies. (single source) - Genera PR reported a reserve of only 30 MW for Puerto Rico's peak demand of 3,069 MW. (single source) - Cuba's national electricity system projected a deficit of over 2,200 MW for the July 31 peak. (single source) - Partial water distribution continues in Comodoro Rivadavia while the main aqueduct is being refilled. (single source) - Water pressure problems in Santo Tomé stem from electric failures at the provincial energy company's facilities. (single source) - Proviservicios suspended gas service in Tibú, Colombia after staff were threatened and a regulation station failed. (single source) ## Timeline ### 2026-09-19: Puerto Rico Energy Bureau demands explanation for proposed rate hike Puerto Rico's Energy Bureau has ordered LUMA Energy and Genera PR to explain a proposed six-cent electricity rate increase during a technical hearing scheduled for late September 2026. 2 sources. https://clstr.news/cluster/puerto-rico-energy-bureau-demands-explanation-for-proposed-rate-hike ### 2026-09-15: Puerto Rico Resident Commissioner demands release of $1.7 billion for power grid Puerto Rico's Resident Commissioner is calling on HUD to release $1.7 billion in stalled federal funds needed to modernize the island's fragile electrical grid and address rising power outages. 2 sources. https://clstr.news/cluster/puerto-rico-resident-commissioner-demands-release-of-17-billion-for-power-grid ### 2026-09-13: Puerto Rico energy crisis causes widespread outages Puerto Rico faces a severe energy crisis as power outages affect over 150,000 customers due to generation deficits and technical failures at major power plants. 4 sources. https://clstr.news/cluster/puerto-rico-power-grid-faces-critical-deficit-as-units-remain-offline ### 2026-09-11: Puerto Rico power outages affect 126,000 customers Over 126,000 customers in Puerto Rico lost power following an unexpected failure at the Costa Sur power plant, amid ongoing structural energy deficits and scheduled maintenance. 5 sources. https://clstr.news/cluster/puerto-rico-power-outages-affect-126000-customers ### 2026-08-30: Puerto Rico power outage affects over 197,000 customers More than 197,000 customers in Puerto Rico lost power following the abrupt shutdown of units 5 and 6 at the Costa Sur power plant, forcing emergency load shedding to stabilize the grid. 7 sources. https://clstr.news/cluster/puerto-rico-power-outage-affects-over-197000-customers ### 2026-08-26: Puerto Rico energy sector faces grid strain and legislative scrutiny Puerto Rico faces energy instability as LUMA Energy warns of grid strain from solar adoption, while new legislation proposes automatic bill credits for outages and scrutiny grows over a failed $5.9 billionpower 2 sources. https://clstr.news/cluster/puerto-rico-energy-sector-faces-grid-strain-and-legislative-scrutiny ### 2026-08-22: U.S. Department of Energy extends Puerto Rico grid emergency orders The U.S. Department of Energy extended emergency orders for Puerto Rico's electric grid through November 2026 to manage rising demand and hurricane risks. 4 sources. https://clstr.news/cluster/us-department-of-energy-extends-puerto-rico-grid-emergency-orders ### 2026-08-13: Puerto Rico Supreme Court to hear LUMA Energy contract challenges Puerto Rico's Supreme Court will hear challenges to LUMA Energy's contract, as Governor Jenniffer González Colón calls for cancellation if any contractual breaches or improprieties are found. 6 sources. https://clstr.news/cluster/puerto-rico-supreme-court-to-hear-luma-energy-contract-challenges ### 2026-08-05: Puerto Rico Energy Authority urges reduced electricity use amid power plant outages Puerto Rico’s Energy Authority asked consumers to cut power use from 5‑11 p.m. as two Costa Sur plant units undergo repairs, to prevent outages. 5 sources. https://clstr.news/cluster/puerto-rico-energy-authority-urges-reduced-electricity-use-amid-power-plant-outages ### 2026-07-26: Puerto Rico Power Outages Planned by LUMA Energy Amid Generation Repairs LUMA Energy will cut power in 23 Puerto Rico municipalities from July 27–Aug 2 for maintenance, while Genera PR reports ongoing generator repairs but sufficient overall capacity. 4 sources. https://clstr.news/cluster/puerto-rico-power-outages-planned-by-luma-energy-amid-generation-repairs ### 2026-07-20: Puerto Rico power grid faces scheduled maintenance and generator outage LUMA Energy’s July 22 maintenance in Puerto Rico caused up to 13‑hour outages in 12 municipalities, and a sudden loss of the San Juan 6 unit triggered load‑shedding affecting over 130 k customers. 9 sources. https://clstr.news/cluster/bogot-water-and-electricity-cuts-scheduled-for-july-2123-2026 --- Cite as: Puerto Rico power grid strain and regulatory scrutiny. CLSTR, https://clstr.news/situations/puerto-rico-power-grid-maintenance