By 2030 Mumbai, Delhi, Chennai and five other cities to experience two-fold increase in heatwave days

Study reveals alarming increase in heatwave days in Indian cities, urging proactive climate resilience strategies by 2030.

A study released by IPE Global and Esri India on Tuesday (June 10, 2025) reveals that Mumbai, Thane, Chennai, Delhi, Surat, Hyderabad, Patna and Bhubaneswar are projected to witness a two-fold increase in heatwave days.

The study titled ‘Weathering the Storm: Managing Monsoons in a Warming Climate’ was unveiled at the International Global-South Climate Risk Symposium in New Delhi as part of the 62nd session of the United Nations Framework Convention on Climate Change to be held in Bonn, Germany from June 16 to 26, 2025.  

The study reveals that extended heat wave conditions are likely to trigger more frequent, incessant, and erratic rainfall events and eight out of ten districts in India are going to experience multiple instances of such rainfall extremes by 2030.  

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Abinash Mohanty, Head of the Climate Change and Sustainability Practice at IPE Global, said that the frequency, intensity, and unpredictability of these extreme heat and rainfall events have risen significantly in recent decades. India has witnessed a 15-fold increase in extreme heat wave days across the March-April-May (MAM) and June-July-August-September (JJAS) months in the last three decades between 1993-2024. Alarmingly, the last decade alone has witnessed a 19-fold increase in extreme heat wave days. The study also found that monsoon seasons in India are witnessing an extended summer-like condition, except on non-rainy days.  

Mr. Mohanty said, “The study and its stark findings suggest how climate change has exposed India to extreme heat and rainfall, and the situation is going to be grimmer and harsher by 2030 with majority of the urban centres are going to be impacted the most.”