Context: A modelling study highlights that high carbon emissions provide a more favourable environment for extreme rainfall events in the Chennai region. 

More on the news:

  • The study carried by the researchers of the Indian Institute of Technology (IIT) Chennai points to uncomfortable climate-change-related scenarios in the future.  
  • This research has been carried out as part of the project ‘Climate change impacts on coastal infrastructure and the adaptation strategies’ funded by the Department of Science and Technology, Government of India, under the SPLICE-climate change programme
  • India has the second highest fatality average due to hazards of climate change. The situation is not going to get any better in the future also, especially for those living in coastal areas, including Chennai. 


  • The south Indian states have encountered an increased number of heavy rainfall events leading to massive floods.
  • Strategic Programmes Large Initiatives and Coordinated Action Enabler(SPLICE) is a Division of Department of Science and Technology, Government of India, that implements various climate change programmes.

What does the study say?

  • Increase in precipitation: The modelling results suggest that the projected precipitation in Chennai can increase by 17.37% on a peak rainy day in the future compared to the current levels. These projections have been made for the year 2075. 
  • Chennai is one of the cities in India where the per capita greenhouse gas (GHG) emissions fall in the higher category
  • The increased intensity and geographical spread of such rainfall events could lead to severe flood events that are likely to continue for more days in the future.
  • This will pose further risk and potential for damage to the local communities
  • In addition to the above, the geographical extent of the region receiving extreme rainfall events is likely to get worse as the duration of the event would get longer. 

Source: https://pib.gov.in/PressReleasePage.aspx?PRID=1634798

Image Source: DTE