This summer, the sweltering heat and humidity in Delhi have significantly amplified the demand for electricity. A recent report from the Centre for Science and Environment (CSE) reveals that the summer of 2025 saw unprecedented levels of heat and humidity (heat index), driving Delhi's electricity consumption to new heights.
Impact of Heat and Humidity in Delhi
The summer of 2025 was not as hot as 2024, yet the rainfall and humidity were higher. During the pre-monsoon period from March to May, the heat index stayed around 31-32 degrees Celsius. Electricity demand was consistent; however, the monsoon months of June to August saw the heat index reaching an overwhelming 46-50 degrees Celsius due to increased humidity.
The citizens of Delhi faced considerable discomfort as air conditioner (AC) and cooler usage surged in search of relief. CSE's study indicates that 67% of Delhi's daily electricity demand is attributed to heat and humidity.
Source: aajtak
Unprecedented Electricity Demand
In 2025, Delhi set a new benchmark for electricity demand, reaching 8442 megawatts (MW) at 11:09 PM on June 12, 2025, marking the second-highest record post-19 June 2024, when it stood at 8656 MW.
From 2015 to 2025, Delhi's electricity demand rocketed from 5846 MW to 8442 MW, a whopping 44% increase in a decade. August 2025 saw a 2% rise in average peak demand compared to the previous year, with 16 out of 31 days recording higher demand than in 2024.
Health Risks from Warmer Nights
In Delhi, both days and nights are getting hotter. Previously, nighttime temperatures would drop by 15 degrees, but in 2025, the difference reduced to only 8.6 degrees. During the monsoon, nighttime temperatures soared to 30.6 degrees, which is 6 degrees over the normal.
This is often due to the urban heat island effect, where concrete buildings and roads release the day’s heat during the night. Warmer nights hinder the body’s cooling process, elevating risks of dehydration, fatigue, and heatstroke.
Source: aajtak
Seasonal Variations in Electricity Demand
Summers (March-August) in Delhi witness a sharp surge in electricity demand, while winters (November-February) see the demand halving. In June 2024, the demand reached 8656 MW with a consumption of 4546 million units (MU), but by February 2025, it dropped to 2041 MU. In April 2025, the electricity consumption was higher compared to the previous year as the summer started earlier. In June 2025, the demand again hit 8442 MW.
Humidity Adds to the Discomfort
The monsoon's extreme humidity exacerbated the heat sensation. As the heat index surpasses 31-32 degrees, people increasingly rely on ACs and coolers. In July-August, the heat index shot up to 46-50 degrees, further boosting electricity demand. CSE's report suggests that heat and humidity account for 67% of the electricity demand, with the remaining attributed to economic activities and lifestyle.
Impact of Climate Change
Climate change has intensified the summer heat and humidity in Delhi. According to the International Energy Agency (IEA), India's temperature has surged rapidly over the last decade, with summers beginning a month earlier. For every 1-degree Celsius rise in temperature, electricity demand climbs by 2%. Cooling needs increased by 21% from 2019 to 2022. However, economically disadvantaged individuals, unable to afford ACs, are most affected by the rising temperatures.
Source: aajtak
Proposed Solutions
CSE has proposed several solutions to address Delhi's escalating heat and power demand:
Energy savings in buildings: Strictly enforce the Energy Conservation Building Code and Eco-Niwas Code. Encourage natural cooling, reflective roofs, and better insulation in buildings.
Cooling shelters: Create cooling shelters for the underprivileged and promote heat protection awareness.
Greener spaces and water: Increase urban green areas and water sources to reduce concrete's impact.
Electricity management: Forecast electricity demand based on weather to maintain grid stability and ensure necessary services receive power.
The Importance of Keeping Delhi Cool
The unrelenting heat and humidity have pushed Delhi's electricity demand to record highs. In 2025, the demand touched 8442 MW, with warmer nights posing health threats. Climate change and urbanization are further compounding the challenges. Through energy conservation in buildings, additional greenery, and improved electricity management, Delhi can remain cool and secure.
