The National Grid Corporation of the Philippines (NGCP) placed the Visayas Grid under yellow alert on Friday, June 12, due to high power demand and the unavailability of several major power plants.

In an advisory, NGCP said the yellow alert would be in effect for two hours, from 6 p.m. to 8 p.m.

According to the grid operator, the Visayas Grid has an available capacity of 2,663 megawatts (MW), while peak demand is forecast to reach 2,441 MW during the alert period.

NGCP reported that a significant amount of generating capacity remains unavailable. A total of seven power plants are on forced outage this June 2026, while eight plants have been on forced outage since May 2026. One plant has been out since March 2026, three since 2025, two since 2024, two since 2023, and one since 2021.

In addition, nine power plants are operating at derated capacities.

These outages and capacity limitations have rendered a total of 863.3 MW unavailable to the Visayas grid.

NGCP identified the unavailability of major coal-fired power plants—TVI 1, TVI 2, and PEDC 3—as among the key factors behind the yellow alert declaration and the operator also cited a high demand forecast.

“A yellow alert is issued when the operating margin is insufficient to meet the transmission grid’s contingency requirement,” NGCP said.