Philippine Luzon Grid Under Emergency Alerts, Sparks Nationwide Rotating Brownouts

The National Grid Corporation of the Philippines (NGCP) placed the Luzon power grid under a series of emergency alerts on Wednesday, May 13, 2026, triggering widespread rotating brownouts that disrupted electricity for over 200,000 customers across Metro Manila and surrounding provinces. The grid was placed under a yellow alert from 2 p.m. To 3 p.m., followed by a red alert from 3 p.m. To 8 p.m., and another yellow alert from 8 p.m. To 10 p.m., prompting the Manila Electric Company (Meralco) to implement Manual Load Dropping (MLD) or rotational power interruptions to manage thinning reserves.

Meralco confirmed that the power interruptions began at 3:23 p.m. and lasted an average of three hours, affecting customers in Batangas, Bulacan, Cavite, Laguna, Metro Manila, and Rizal. The NGCP later announced additional rotating brownouts from 8 p.m. To 9 p.m. in several areas, including parts of La Union, Ilocos Sur, Pangasinan, Isabela, Quirino, and Batangas, to maintain the integrity of the power system.

The NGCP’s decision came as the Luzon grid faced severe strain due to thinning electricity reserves, forcing the implementation of emergency measures to prevent a full system collapse. The NGCP’s alerts and Meralco’s MLD actions are standard protocols during Red Alert status, which is declared when power supply falls critically short of demand. While the exact cause of the supply crunch was not detailed in the primary sources, the NGCP and Meralco have been working to restore normal service levels.

In parallel, the Department of Energy (DOE) has ordered the fast-track restoration of power plants in Visayas amid similar red and yellow alerts affecting the region. The NGCP has also implemented rotational brownouts in the Visayas grid, though the scale and duration of those interruptions were not specified in the verified reporting.

Meralco has taken additional steps to mitigate the impact on consumers, including a temporary reduction in power rates by P0.0151 per kilowatt-hour for May 2026, though this measure does not address the immediate supply shortages. The DOE and power firms are coordinating to stabilize the grid, but no timeline for a full recovery has been provided in the primary sources.

Customers in affected areas are advised to monitor official updates from Meralco and the NGCP for real-time information on outage schedules and restoration efforts. The NGCP and DOE have not yet issued statements on long-term solutions to prevent future supply shortages, but ongoing assessments are underway to address the underlying grid vulnerabilities.