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The National Grid Corp. of the Philippines raised the red alert warning on the Luzon power grid from 2 p.m. to 4 p.m. yesterday. Yellow alert notice, on the other hand, was up from 11 a.m. to 2 p.m. and 4 p.m. to 5 p.m.
STAR / File
MANILA, Philippines — The Visayas grid will be placed on yellow alert on Sunday evening, May 31, due to thin power reserves, the National Grid Corp. of the Philippines said.
NGCP said the yellow alert will be in effect from 6 p.m. to 9 p.m.
"A yellow alert is issued when the operating margin is insufficient to meet the transmission grid's contingency requirement," NGCP said.
The Visayas grid has 2,573 megawatts of available capacity against a projected peak demand of 2,327 MW.
Power plants offline. A total of 959.05 MW has been knocked offline, with 12 power plants running on restricted capacity and 22 units on forced outage.
More than half of the offline facilities stopped operating in May 2026, while another went down in March 2026.
Three have also been inactive since 2025, two since 2024, two since 2023 and one since 2021.
According to NGCP, the yellow alert was triggered partly by the outages of major Visayas coal facilities, specifically TVI 1, TVI 2, PEDC 3 and KSPC 2.
This follows weeks of yelow and red alerts affecting the Luzon and Visayas grids, with under-resourced power supply causing rotating brownouts across many areas.
