Published June 4, 2026 6:40pm + Add GMA on Google Make this your preferred source to get more updates from this publisher on Google. The National Grid Corporation of the Philippines (NGCP) on Thursday placed the Visayas grid under yellow alert due to forced outages and derated capacities of several power plants.In an advisory, the NGCP said a yellow alert status is hoisted over the Visayas from 5 p.m. to 9 p.m.The grid operator said the factors that contributed to the yellow alert declaration:Unavailability of Visayas' large coal plants TVI 1, TVI 2, PEDC 3High system demand forecastThe islands-cluster is operating at 2,606 megawatts (MW) against a peak demand of 2,411 MW.Meanwhile, a total of 931.3 MW capacity is unavailable to the grid as four plants are on forced outage on June 2026, eight plants are on forced outage since May 2026, one plant since March 2026, 3 plants since 2025, two plants since 2024, two plants since 2023, and one plant since 2021, while 16 plants are running on derated capacities.A yellow alert is issued when the operating margin is insufficient to meet the transmission grid’s contingency requirement. —LDF, GMA News