Parts of Khyber Pakhtunkhwa (KP) and Punjab are without electricity after the Tarbela and Mangla power houses tripped on Friday morning.
According to local media, Lahore, Gujranwala, Sheikhupura, Sialkot, Faisalabad, Gujrat in Punjab dont have electricity.
Official buildings and hospitals are forced to use generators and alternate means.
Restoration will take between two to four hours, WAPDA told local media.