Archive · 18 Jul 2026
Rising Temperatures Cause Sleep Loss in India
People around the world, including in big cities in India, are losing sleep because it's getting too hot at night.
A study found that on average, people have lost about 56 hours of sleep each year from 2020 to 2025.
In cities like Chennai, Mumbai, and Delhi, people are losing even more sleep.
This is not just because of the heat, but also because of things like using too much screen time, eating at odd times, and working night shifts.
Not getting enough sleep can make people sick and less productive.
Experts say this is a big problem that needs to be fixed, not just by individuals but by everyone working together.
Global average sleep loss due to high night-time temperatures is 56 hours annually (2020-2025).
In India, Chennai residents lose 93 hours, Mumbai 84 hours, and Delhi 67 hours of sleep annually.
10% of global sleep loss is directly attributable to climate change.
Other factors contributing to sleep loss in India include lifestyle changes, screen time, and work schedules.
Chronic sleep deprivation is linked to health issues like hypertension, diabetes, and heart disease.
- Who
- People in over 1,300 cities worldwide, including Indians in Chennai, Mumbai, and Delhi
- What
- Loss of sleep due to high night-time temperatures and other factors
- When
- Between 2020 and 2025
- Where
- Global cities, with specific data on India's largest cities
- Why
- Rising temperatures and lifestyle changes are contributing to sleep loss
- Global Average Sleep Loss
- 56 hours annually (2020-2025)
- Sleep Loss in Chennai
- 93 hours annually
- Sleep Loss in Mumbai
- 84 hours annually
- Sleep Loss in Delhi
- 67 hours annually
- Attributable to Climate Change
- 10% of global sleep loss