The all-time record for electricity consumption is 60.5 GW, set in July 2015.
The record use of power is being driven by the current extreme heat gripping the country, with people turning on fans and air conditioning in the attempt to keep cool.
On Wednesday, the number of major cities on red alert climbed from 20 to 23 and the health ministry activated a helpline for people to seek assistance and advice.
The extreme heat is set to ease slightly in the coming days, with the number of cities on red alert dropping to 18 on Thursday and Friday.
ANSA