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India's water and power supply will be tested by extreme heat this summer

The demand for electricity will be at record levels during hot days

The heat will add to the water stress in cities

Water shortages in the future can be avoided by reusing wastewater

Bhasker Tripathi

India Meteorological Department warns that many parts of the country may experience more hot days than average this summer.

The Council on Energy Environment and Water (CEEW), an independent policy think-tank based in Delhi, has found that the intensifying heat is already causing spikes in demand for electricity to cool, while increasing pressure on water supplies.

India, which already struggles to meet its energy demands due to the Iran War, has seen its demand for electricity rise. India imports 90% of its oil, and 60% of its natural gas.

Heatwaves in India are not only a health issue, but they also act as a stress-test for the country's urban water and electricity systems.

Record Temperatures Expected

In May 2024, India's hottest ever year, electricity demand peaked at 250 gigawatts, causing power outages throughout the country. Peak demand in 2025 was 4% less than in June of last year, or nearly 240 gigawatts.

The researchers say that India's electricity demand for 2026 has already exceeded projections, as the hot weather came earlier than normal after the world experienced its fifth warmest month on record.

International Energy Agency reports that cooling already accounts for 20% of India's peak electric demand.

Disha Agrawal is the senior programme leader at CEEW. She said that due to the unusually warm summer weather, peak electricity demand may rise to 260 gigawatts.

This level of demand exceeds the entire capacity of electricity generation of many middle-sized countries.

India's installed capacity for power generation is about 500 gigawatts, approximately half of which comes from non-fossil fuels, primarily solar and wind power, but also hydro and nuclear.

Solar and wind power are intermittent, whereas coal plants produce electricity continuously.

India's gas consumption is only 2% of the total electricity generated, but it uses 8 gigawatts during heat waves or periods of high demand.

In order to meet peak summer demand in a period of geopolitical uncertainty, the Indian Government has ordered coal plants to operate at full capacity, deferring maintenance. It plans to use solar energy for daytime power.

CLEAN ENERGY GROUP GOALS

Researchers?said that the variability of renewable energy, limited battery storage, and ageing grids remain major challenges to India's electrical system. Extreme heat could also further strain infrastructure.

Agrawal said that "Scaling up clean energy quickly is critical for meeting India's growing power demand reliably, and affordably."

She said that if India's electricity demand grows faster than projected, it may be necessary to increase its non-fossil energy capacity to 600 gigawatts by 2030.

The extreme heat in India is increasing the pressure on water systems. This is particularly true in cities with limited freshwater resources.

According to the Central Pollution Control Board (CPCB), India treats just?28%?of its wastewater. This leaves most cities with no functioning systems for reusing treated water in industry, agriculture, or other non-drinking applications.

Nitin Basi, fellow of CEEW, stated that India could reuse over 31,000 million cubic meters of treated wastewater each year by 2047, if?supported by investments and policy reforms. This is about 30 times the water used by Delhi in a year.

Bassi said that "scaling up treated wastewater reuse is one of most practical ways for Indian cities to ensure water security."

Many states and cities are preparing to meet the increasing demand for water and heat. As part of an action plan for the summer, Delhi authorities have increased tanker fleets, installed monitoring systems, and opened emergency water centres.

Climate change has reshaped heat patterns in the country. According to a CEEW report last year, more than half of India’s districts, which are home to 76% of its population, are susceptible to extreme heat.

Experts report that many cities still rely more on short-term solutions such as cooling shelters or water kiosks than they do on long-term changes to infrastructure needed to deal with the continued rise in temperatures.

(source: Reuters)