Nautapa refers to a traditional nine-day period associated with peak summer heat in the Indian subcontinent. Derived from the Sanskrit words “Nau” (nine) and “Tapa” (heat), the period begins when the Sun enters the Rohini Nakshatra during the Hindu month of Jyeshtha.
According to traditional Indian astronomy and the Panchang (Hindu almanac), this solar transition marks the most intense phase of pre-monsoon summer. In 2026, Nautapa is observed from May 25 to June 2, with temperatures in several parts of India already crossing 46–47°C ahead of the period.
While the India Meteorological Department (IMD) does not officially classify Nautapa as a scientific weather event, the dates often coincide with some of the hottest days of the year across North and Central India.
The Nautapa period coincides with a combination of seasonal and atmospheric conditions that significantly raise temperatures across India. By late May, the Sun is positioned closer to its northernmost point before the summer solstice, causing solar rays to strike the subcontinent more directly and intensify surface heating.
At the same time, much of North and Central India remains dry ahead of the monsoon, with little cloud cover or moisture in the air to absorb heat. The ground stores heat during the day and releases it slowly at night, keeping temperatures unusually high even after sunset.
Another major factor is the “Loo”, the hot, dry winds blowing from the Thar Desert, which further increases heat stress and dehydration. In urban areas, concrete and asphalt trap heat, creating the urban heat island effect that pushes city temperatures several degrees above nearby rural regions.
Climate change is also amplifying the impact. Rising baseline temperatures and warming weather patterns such as El Niño have contributed to longer, earlier and more intense heatwaves across India in recent years.
The India Meteorological Department does not officially use the term “Nautapa,” but its peak heat-risk period often aligns with this traditional nine-day window identified in ancient Indian astronomy. Scientists note that India’s heatwaves are now arriving earlier, becoming more intense, and lasting longer due to rising baseline temperatures.
Between 2000 and 2020, heatwaves claimed over 10,000 lives in India, with the elderly, children, outdoor workers, and urban poor being most affected. In 2026, this period represents one of the highest-risk windows for extreme heat exposure.
India’s 2026 summer is shaping up to be unusually severe, with scientists pointing to multiple overlapping climate and environmental factors, and some forecasts suggesting it could be among the hottest summers in over a century.
Global warming has raised baseline temperatures worldwide, making heatwaves more frequent, intense, and longer-lasting. At the same time, loss of forests and green cover has reduced natural cooling, allowing land areas to heat up faster and retain more heat.
This year has also seen an early onset of peak summer conditions, giving less time for acclimatisation. Warmer nights, driven by urban heat retention, are further worsening heat stress by preventing the body from cooling down properly.
Adding to this, a possible “super El Niño” event may be amplifying temperatures across South Asia, intensifying already extreme conditions during the season.
Ancient wisdom and modern medicine align surprisingly well here. Here is what you should be doing during Nautapa:
Hydrate Aggressively: Drink at least 3–4 litres of water daily, even if you don't feel thirsty. Coconut water, ORS, nimbu paani, lassi, aam panna, and buttermilk replenish electrolytes lost to sweating.
Stay Indoors 11AM–4PM: Peak heat hours. If you must go out, do it before 9AM or after 6PM. The Loo is most dangerous between noon and 4PM.
Wear Light, Loose Cotton: Light-coloured, loose, breathable cotton allows sweat to evaporate efficiently, your body's primary cooling mechanism. Cover your head and face when outdoors.
Eat Light & Cool: Avoid heavy, spicy, oily food. Favour curd, fruits with high water content (watermelon, cucumber), cooling foods. Reduce tea, coffee, and alcohol, all dehydrate.
Cross-Ventilate Your Home: Open windows at night and early morning to flush out heat. Use wet curtains or khus (vetiver) screens. Damp a mat before sleeping to cool the floor.
Check on the Vulnerable: Elderly neighbours, infants, people doing outdoor labour, and those with heart or kidney conditions are highest risk. A single daily check-in can save a life.
Never Leave Anyone in a Parked Car: Temperatures inside a parked car can reach 60–70°C within minutes. Children and pets must never be left unattended even for a moment.
Use Traditional Cooling Remedies: Aam panna (raw mango drink), sattu (roasted gram flour drink), thandai, these are not just cultural traditions. They are clinically effective electrolyte and cooling preparations.