Logo of NGCP, the country’s electricity superhighway – File photo

MANILA, Philippines — Tight power supply has forced the Visayas grid into a three-hour yellow alert on Monday as more large coal plants remain offline.

In an advisory, the National Grid Corp. of the Philippines said the yellow alert would be in effect from 5 p.m. to 8 p.m.

READ: DOE vows better Visayas power before Marcos exits

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