The Visayas grid will again be placed under yellow alert status on Friday, May 22, 2026, due to thin power supply, according to the National Grid Corporation of the Philippines (NGCP).

In an advisory issued Thursday, the NGCP said the yellow alert will be in effect from 3:00 p.m. to 4:00 p.m. and from 5:00 p.m. to 9:00 p.m.

This marks the fifth straight day that the Visayas grid has been placed under yellow alert this week.

The NGCP said the alert was triggered by high power demand and the unavailability of several large coal-fired power plants in the Visayas region.

A yellow alert is declared when the operating margin is insufficient to meet the transmission grid’s contingency requirement, indicating a thin power supply buffer.

During the alert periods, the Visayas grid recorded an available capacity of 2,653 megawatts (MW) against a peak demand forecast of 2,485 MW.

The NGCP reported that a total of 885.3 MW remains unavailable to the grid. Fourteen power plants have been on forced outage since May 2026, one plant since March 2026, three plants since 2025, two plants since 2024, two plants since 2023, and one plant since 2021. In addition, 12 plants are currently operating on derated capacities.

Among the major factors cited for the yellow alert declaration were the unavailability of large coal plants TVI 1, TVI 2, and PEDC 3, along with high forecasted system demand.