Manila, Aug. 6 -- A yellow alert status was again raised over the Visayas grid Wednesday, for 3-4 p.m. and 5-7 p.m., given the forced outages and de-rated capacities of several power plants serving the grid.

This, even after the National Grid Corporation of the Philippines (NGCP) lifted the yellow alert status for the area by 9:04 p.m. Tuesday.

A yellow alert status is raised over an area if the available capacity has very little margin compared to the expected demand.

In an advisory Wednesday, the power transmission operator said available capacity in the Visayas grid during the day is around 2,538 megawatts (MW) while peak demand is projected to be about 2,369 MW.

"11 plants have been on forced outage from April to August and six ot...