The Luzon and Visayas power grids have again been put on red alert on May 23, Thursday.

The National Grid Corp of the Philippines said the following power alerts were in effect: 

The NGCP said a red alert status is issued when the power supply is insufficient to meet consumer demand and the transmission grid’s regulating requirement. This means rotating brownouts can be expected during these times.

A yellow alert is issued when the available power is not enough to meet the transmission grid’s contingency requirement, meaning rotating brownouts are possible.

The NGCP said several plants are on forced outage or running on lowered or derated capacities. For Luzon, a total of 2,525.5 megawatts are unavailable to the grid.

For the Visayas grid meanwhile, a total of 553.1MW is unavailable to the grid.

The Philippines has been experiencing power shortages since April. The head of the Department of Energy has even called the situation a “calamity.”