46 Degrees & Transformer Blasts: Why the ‘Super El Niño’ is Killing the Power Grid in North India Today and How to Protect Your Appliances
North India is currently experiencing extremely high heat and loads. In regions such as Delhi and Uttar Pradesh, temperatures are growing close to 45°C to 46°C, as electricity providers are reporting that they have transformers failing under higher than normal loading, experiencing outages, and that equipment has been damaged as a result of the higher temperatures and higher loads.
The connection to El Niño is indirectly powerful because one of the main ways that El Niño affects our weather patterns is by lengthening and intensifying heatwaves thereby raising the electricity consumption to levels that are unmanageable for the distribution system.
Why Transformers Are Failing in This Heat
1) Demand Spikes to Capacity Levels
Multiple devices that use ACs, coolers, fridges; evenings have residential and commercial loads that are added together; feeders are operating at or near capacity for long periods of time.
2) Heat Mitigates Equipment Tolerance
Equipment is cooled with oil; heat raised ambient temperature reduces the equipment’s ability to dissipate heat; if the internal temperature of the transformer starts to rise at an increased rate, then the insulation inside the transformer becomes stressed and may trip. If the load is exceeded for an extended period of time, the transformer will start to burn out or explode.
3) Voltage Instability
As the load increases, the voltage from the transformers decreases and there can be significant fluctuations. If the voltage is low, the current that the transformer/equipment draws will increase, which will heat up all the wiring and equipment.
4) Urban Heat + “No Cool Nights”
Once the sun goes down, the heat in our cities generally remains for a long time after sunset. This means that the electrical grid has no recovery period overnight. The continued loading of the transformer/equipment overnight creates a thermal load that continues to heat up the transformers and equipment.
India & Global Heatwave Alerts You Should Know
Explore Mumbai AC struggling peak hours why?
Discover why cooling systems fail during extreme demand.
Check Rajasthan heat surge reaching Delhi?
Explore how rising temperatures may spread across regions.
Discover Mumbai night heat not dropping?
Check why warm nights are becoming dangerous.
Explore Dubai nearing 50 degree threshold?
Discover why extreme heat is arriving earlier than usual.
Check Delhi no cool night alert?
Explore why residents may not get nighttime relief.
Why 2026 Feels Worse
In addition to the longer record heat waves related to the effects of an El Niño, including:
- Multiple days with record peak demand in short time frames
- Rapid urban growth is creating places where there is inadequate distribution of improvements
- The result is that we will have a system that is operating at/near its thermal limits and capacity for an extended period of time.
What This Means for Your Home
If you do not receive power interruptions, you will still likely see:
- Flickering lights or dimming at peak demand times
- High utility bills due to electrical usage being exceeded and/or AC systems may not operate properly because of low voltage
- Increased risk of appliance failure due to power surges and/or intermittent electrical service.
What Authorities Are Doing
Some of the things utilities are doing to improve service during times of extreme heat include:
1) Mobile transformers are being deployed in high-load areas
2) Feeder-level monitoring is being increased
3) Plans for Load balancing and Demand response delivery measures are being developed by utilities
Despite these efforts, last-mile infrastructure (i.e., local transformers and feeders) will remain the most vulnerable during times of extreme heat.
Final Words
What is happening to the grid now in North India is a classic Thermal Stress Event (much like an individual body), the grid is struggling to cool itself while under sustained load.
While you cannot control the ambient temperature, you can mitigate your electrical risk by stabilizing voltage, avoiding peak load, and protecting critical appliances.
FAQs
1) Are transformer explosions a common occurrence during heatwaves?
They become more frequent when you have an Overload and High Ambient Temperature at the same time.
2) Is El Niño the direct cause of power outages?
No, rather, El Niño causes a significant increase in ambient temperature, indirectly increasing demand and stress on the grid.
3) Should I set my A/C for very low temperatures to help cope?
No, the best temperature setting for your A/C is between 24 and 26 degrees centigrade. Setting it at very low temperatures increases loads on the grid, causing increased fluctuations.
4) When are the highest conditions for potential outages?
Between the late afternoon and early morning, usually from 1600 to 2000 hours. At this time, heat is at its peak, and up to 75% of energy needs are also being consumed on the grid.
