The Visayas power grid has been placed under red and yellow alerts on Wednesday, August 26, 2026, as the region faces a tightening electricity supply situation that could increase the risk of temporary power interruptions during peak demand hours.
According to the National Grid Corporation of the Philippines (NGCP), the Visayas grid is scheduled to be under a yellow alert from 2 p.m. to 3 p.m., followed by a red alert from 3 p.m. to 9 p.m. Another yellow alert is scheduled from 9 p.m. to 10 p.m.
The warning comes as available generating capacity is estimated at only 2,324 megawatts (MW) against a projected peak demand of 2,550 MW.
That leaves the grid facing a significant supply gap during the period when electricity consumption is expected to be at its highest.
Why is the Visayas grid under red alert?
NGCP attributed the tight supply situation primarily to the unavailability of major coal-fired generating units, including Therma Visayas Inc. (TVI) Units 1 and 2 and KEPCO SPC Power Corp. Unit 1.
The grid is also receiving limited electricity imports from Mindanao because of higher demand in the Mindanao grid and the planned outage of TSI 1, further reducing the amount of power available to the Visayas.
NGCP also reported that several generating plants remain unavailable or are operating below their normal capacity.
As a result, approximately 901 MW of generating capacity is unavailable to the Visayas grid, according to the latest advisory cited by GMA News.
The situation has persisted for several days, with power authorities repeatedly issuing red and yellow alerts across the Visayas this month.
Earlier reports from the Philippine News Agency also identified the continued outages of TVI Units 1 and 2 and KSPC Unit 1 as major factors behind the grid’s supply shortage.
What does a red alert mean for consumers?
A red alert is issued when available electricity supply is insufficient to meet consumer demand while also maintaining the transmission grid’s required regulating reserve.
In practical terms, this means the grid has very little room to absorb unexpected increases in demand or additional generating-unit failures.
If the supply situation becomes critical, distribution utilities may be instructed to implement manual load dropping, temporarily disconnecting selected areas to reduce demand and protect the wider power system.
This does not automatically mean every household in the Visayas will experience a blackout, but the risk of rotational or scheduled power interruptions becomes substantially higher during a red alert.
A yellow alert, meanwhile, means supply remains sufficient for projected demand but the available operating margin is below the required contingency level. It is therefore considered an early warning that the grid is operating with thinner reserves.
Power shortage has been building across the Visayas
The latest alert is part of a continuing supply problem in the region.
Reports earlier this week showed the Visayas grid repeatedly entering red-alert conditions because several major generating units remained offline while demand stayed elevated.
On Aug. 25, PNA reported that the grid was expected to have around 2,421 MW of capacity against 2,570 MW of peak demand, with about 904.5 MW of capacity unavailable because of forced outages and derated generating plants.
The Philippine Daily Inquirer also reported warnings issued to electricity consumers in Tacloban City, Palo and Babatngon in Leyte, where the local electric cooperative said it could implement temporary disconnections if NGCP directed it to reduce its load.
Government looks to batteries and returning power plants
The Department of Energy (DOE) has been working on measures intended to ease the supply pressure.
Energy officials have pointed to the expected return of several major generating units, including TVI Unit 2 and KEPCO SPC Power Corp., while other generating capacity is expected to return later.
The DOE is also pursuing the use of battery energy storage systems (BESS) in strategic locations across the Visayas, including Leyte, Cebu, Panay/Iloilo and Negros.
The Freeman reported that the DOE is seeking to mobilize around 253 MW of battery storage capacity to help stabilize the grid during periods of tight supply.
Energy officials have said the return of offline generating units, combined with additional battery storage, could significantly reduce the frequency of red and yellow alerts in the region.
What consumers should watch today
The most critical period is expected to be the 3 p.m. to 9 p.m. red-alert window, when demand is projected to put the greatest pressure on available supply.
Consumers in affected areas should monitor announcements from their local electric cooperatives or distribution utilities, particularly if NGCP orders load reduction.
The immediate concern is not simply whether electricity demand is high—it is whether enough generating capacity remains available to provide a safe reserve when demand peaks or another generating unit unexpectedly goes offline.
For now, authorities continue to monitor the situation as they work to restore unavailable generating units and add additional capacity.
And with the Visayas grid entering another lengthy red-alert period today, the question many consumers will be watching is simple: will the available supply hold—or will some areas be forced into temporary brownouts?
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