As per top ministry officials, transmission lines have not been completed on time and are the main reason for the shortages in the national capital.
Large parts of Delhi continued to face long outages as the power transmission network damaged by a devastating storm on May 30 is yet to be restored fully.
Separately, the ministry officials said NTPC, the country's largest power producer, is ready to surrender 3 million standard cubic metres a day of its requirement of gas for the Delhi government's Bawana plant, if the need arises.
The national capital sizzled at 45.5 degrees Celsius, six notches above normal and the highest in the month of June in the past 10 years.
As per the Met Office, no respite is expected from the intense heat wave in the city and the maximum temperature is expected to be about 46 degrees Celsius in the next few days.
Snapping power supply to shopping malls after 10 PM and switching off street lights during peak hours were some of the measures ordered yesterday by the Lt Governor Najeeb Jung as temporary steps to deal with the situation.