A study, ‘Climate Change and Heat-Induced Mortality in India’ was conducted by the Climate Impact Lab in collaboration with the Tata Centre for Development at the University of Chicago.

Findings w.r.t India:

  • India’s energy use will more than double in the next 20 years, driven largely by fossil fuels. 

  • If emissions continue to be as high as they are at present, India will see a death rate of about 60 per 100,000 by 2100, the study says.


Death Rate or Mortality Rate

Mortality rate is an indicator of number of deaths in a population or sub population, scaled to the size of the population per unit of time. Mortality varies access the various sub groups of population. In India it is calculated as Deaths occurring per thousand population during one year . As per Office of Registrar General of India it was 6.3 per 1000 in 2017.  

  • It says the average annual temperature in India is expected to increase from 24°C to 28°C

  • The number of extremely hot days (above 35°C) across India is expected to increase by over eight times, from 5.1 per year in 2010 to 15.8 in 2050 and 42.8 in 2100. 


Findings w.r.t States:

  •  The National Capital Region is projected to see 22 times more extremely hot days and more than 23,000 climate-related deaths annually by 2100 in a high-emission scenario.

  • Odisha is projected to see the highest increase in the number of extremely hot days, at about 30 times more than what it is today. Punjab is projected to experience 85 extremely hot days a year, the highest among all states.

  • Overall, the six states of Uttar Pradesh (4,02,280), Bihar (1,36,372), Rajasthan (1,21,809), Andhra Pradesh (1,16,920), Madhya Pradesh (1,08,370) and Maharashtra (1,06,749) are projected to account for over 64 percent of the heat-related deaths.


Impact of High Emission Scenario:

  • It projected that 1.5 million more Indians may die per year from extreme heat due to climate change by 2100

  • This projected death rate is double the current death rate from oral cancer in India, which is the most common cancer in the country. 

  • The risks associated with extreme temperatures vary around the world and are dependent upon the wealth of a country.

    •  For instance, the impact of a single hot day on the annual mortality rate of a wealthy and warm city such as Houston, US, will be 0.4 deaths per 100,000. The same will be double for a warm and poorer city such as Delhi, at 0.8 deaths per 100,000.

Ray of Hope:

While the projected death rate in a high-emission scenario is 60 per 100,000 by 2100, mitigation of emissions will bring down the death rate to roughly about 10 per 100,000, the study says.