India’s Changing Monsoon 

The 2025 Southwest Monsoon drenched nearly half of India in record-breaking rainfall, leaving behind floods, landslides, and over 1,500 lives lost. The season ended with 108% of the long-period average (LPA) rainfall, marking the second consecutive year of above-normal monsoons. Experts confirm what science has long warned. climate change is now driving India’s monsoon. 

Key Developments 

• 45% of India experienced extreme rainfall, with 2,277 flood and heavy rain events recorded. 

• Northwest India saw 27% excess rainfall, the highest since 2001, with Ladakh recording an astonishing 342% surplus. 

• Central India, including Gujarat, Madhya Pradesh, and Maharashtra, also witnessed excess rainfall. 

• In contrast, East and Northeast India recorded a 20% deficit, one of the lowest since 1901, with Assam and Bihar among the worst affected. 

• August was the most destructive month, with 59 major river level breaches across nine basins, including 32 in the Ganga basin. 

Climate Change and Polar Connection 

Scientists are now calling India’s 2025 monsoon a climate-driven monsoon, shaped by both regional and global changes. 

• Warmer seas in the Arabian Sea and Bay of Bengal have supercharged evaporation, sending more moisture into the atmosphere. 

• Shifts in the subtropical westerly jet and Western Disturbances, influenced by Arctic and Himalayan warming, are pushing monsoon systems northward and slowing their movement. 

• Melting glaciers and permafrost thaw in the Himalayas are amplifying floods and landslides downstream. 

These interconnected processes show how polar and high-mountain changes are reshaping monsoon behavior thousands of kilometers away. 

Health and Socioeconomic Implications 

• Public Health: Increased outbreaks of waterborne and vector-borne diseases, rising heat stress, and deteriorating sanitation in flooded areas. 

• Agriculture: Crop losses from waterlogging and erosion threaten food security and farmer livelihoods. 

• Infrastructure: Repeated flooding damages roads, bridges, and homes, escalating recovery costs. 

• Economic Pressure: Disruptions to agriculture, trade, and urban systems are straining local economies and state disaster budgets. 

Urgent Response Needed 

India’s changing monsoon demands immediate adaptation and mitigation measures: 

• Resilient Urban Planning: Invest in flood-resilient cities, improved drainage, and green buffers. 

• Water Management: Strengthen river basin governance and integrate early warning systems. 

• Public Health Preparedness: Build community awareness and responsive health systems for climate-related diseases. 

• Global Emission Reductions: To limit future extremes, nations must cut fossil fuel use and curb global warming. 

India needs to brace itself for increasingly intense and unpredictable monsoon seasons. 

Read more about extreme weather here. 

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