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MANILA, Philippines – The yellow alert remained in effect over the Visayas grid on Tuesday due to thin reserves, though the alert period is shorter than in previous days.

In an advisory, the National Grid Corp. of the Philippines said the yellow alert will be in place from 6 p.m. to 7 p.m.

READ: More outages possible amid insufficient power supply

This, as the three large coal facilities continued to be offline.