“We have taken several steps to tackle the water shortage problem, like reducing water supply from twice a day to once a day in many areas,” Atishi said, the Indian Express reported.
“The water thus saved will be rationed and supplied to water-scarce areas where the supply is available only for 15 to 20 minutes daily,” he said.
The Yamuna, a tributary of the Ganges, which is highly polluted, passes through Delhi, but its flow reduces considerably during the summer months.
Delhi is almost entirely dependent on water from neighbouring Haryana and Uttar Pradesh, both of which are agricultural states and have very high water demands.
Many blame the rising temperatures on strong winds blowing from Rajasthan, where the temperature on Tuesday was the hottest in the country at 50.5 degrees Celsius.
Phalodi, a desert region of Rajasthan, holds the record for the hottest summer in the country, with temperatures reaching 51 degrees Celsius in 2016.
Neighbouring Pakistan has also been experiencing intense heat for a week, peaking at 53 degrees Celsius in rural Mohenjo Daro in Sindh province on Sunday.