Heatwave 2026: India in the grip of extreme temperatures

Have you ever noticed your mood shifting on days when the heat feels almost unbearable? The smallest things start to feel irritating and even routine tasks seem oddly exhausting. As extreme heat tightens its grip across continents, experts say this is not just discomfort, but has a measurable impact on the human mind and body. According to reports, with temperatures crossing 45 degrees in parts of India and heatwave conditions intensifying across north-west and central regions, multiple cities have already been pushed into extreme stress zones.

Experts are also warning that the effects go beyond physical health. According to Dr Sonal Agarwal, a psychologist at Navayuga Kanya Vidyalaya, Lucknow, “Intense heat increases irritability because it raises overall stress and lowers emotional stress and lowers emotional control. When people feel uncomfortable for long periods, their patience naturally decreases.” Research adds that high temperatures can impair attention, memory and emotional regulation by increasing stress hormones and disrupting sleep.

India is currently experiencing one of the most intense phases of the 2026 heat season. The India Meteorological Department (IMD) has issued heat alerts across multiple states, warning that the situation is likely to continue for several days. Among the worst-affected regions, Uttar Pradesh, central India and Maharashtra’s Vidarbha belt have emerged as key hotspots. Temperatures have consistently climbed above 45 degrees in several districts, with Banda recording as high as 47.4 degrees. Delhi has also been placed on alert as authorities implement heat action plans, including measures to protect outdoor workers and schoolchildren.

The current heatwave is the result of multiple reinforcing climate drivers, including oceanic warming patterns and long-term climate change. One of the key factors is the return of El Niño conditions. For India, this is critical because El Niño events are often linked with weaker monsoon performance. The IMD has already forecast a below-normal southwest monsoon for 2026. Reduced rainfall allows land surfaces to heat up more quickly, intensifying heatwave conditions.

Extreme heat pushes the human body and brain toward their biological limits. When a combination of heat and humidity crosses the ‘wet-bulb temperature’ threshold of around 35°C, the body can no longer cool itself effectively. This can lead to dehydration, heat exhaustion and heatstroke. Dr Akanksha Rastogi of Children First in Gurgaon explains that children are among the most affected, as rising temperatures disrupt their daily activity, energy balance and emotional regulation.

Heat also places heavy strain on the heart and kidneys. Scientists explain that heat increases cortisol, the body’s primary stress hormone, while disrupting serotonin levels. Dr Jyoti Mishra, Senior Consultant - Psychology at Apollo Spectra Hospital, Delhi, notes that physical discomfort directly impacts emotional control and concentration. Studies show declines in attention, memory retention and decision-making ability, creating ‘mental fatigue’ or heat-induced brain fog.

The impact of extreme heat continues at night, disrupting sleep cycles. Research shows that ideal sleep temperatures lie between 19°C and 21°C. When nighttime temperatures remain high, the body finds it harder to lose heat, leading to shallow, broken sleep. This affects melatonin production, resulting in next-day fatigue and lower productivity.

Extreme heat is acting as a silent economic shock that slows productivity and disrupts labor systems. Industrial output is particularly vulnerable, especially in sectors like construction and manufacturing. Governments are relying on early warning systems and heat action plans, such as ensuring water and power supply and restricting outdoor work during peak hours (1 pm to 4 pm).

Survival strategies include regular hydration, consuming water-rich foods, wearing loose-fitting cotton clothing and staying in shaded areas. Simple cooling techniques like using fans, taking cold showers and applying wet cloths can help lower body temperature. The broader outlook suggests a hotter, more uncertain future, with experts emphasizing that adaptation measures must be paired with efforts to address greenhouse gas emissions.