Climate Change Reshapes India's Monsoon as Extreme Weather Patterns Intensify

Speaking on a podcast hosted by the Policy Perspectives Foundation, India Meteorological Department Director General Mrutyunjay Mohapatra outlined the complex forces driving the transformation of the country's monsoon system and the growing challenges associated with forecasting and preparedness.

According to Mohapatra, multiple interconnected climate factors influence India's rainfall patterns. El Niño weakens the atmospheric circulation that transports moisture inland, while winter snow cover in the Himalayas can suppress subsequent monsoon activity. The Indian Ocean Dipole also plays a crucial role, either strengthening or offsetting the effects of other climate systems.

For 2026, a mid-season shift toward El Niño is expected to result in below-normal rainfall across large parts of the country, although the northeastern region may receive above-normal precipitation. Despite the forecast of reduced overall rainfall, the threat of flooding remains significant.

Climate experts increasingly caution that dry years and dangerous weather events are no longer mutually exclusive. Rising ocean temperatures allow the atmosphere to hold greater amounts of moisture, leading to short-duration but highly intense rainfall events capable of causing widespread flooding.

The consequences of this shift have already become evident in recent years. In 2023, Chandigarh received nearly half of its annual rainfall within a span of just 50 hours, while Kerala experienced a severe rainfall deficit during the same month of June. Experts note that these contrasting events were not isolated anomalies but manifestations of the same climate-driven instability affecting the monsoon system.

Additional concerns are emerging from the Himalayan region, where glaciers are melting faster than previously projected. The retreating ice has created unstable glacial lakes that are vulnerable to sudden breaches. Similar events contributed to the destruction witnessed in parts of Kedarnath in 2013 and the severe flooding that struck Sikkim a decade later.

Scientists are also monitoring the increasing intensity of western disturbances and the growing unpredictability of weather systems originating in the Bay of Bengal. Individually, each trend presents substantial risks. Collectively, they indicate mounting pressure on India's monsoon system from multiple directions.

Mohapatra emphasized that scientific forecasting remains a critical tool for reducing disaster-related losses. Established in 1875, the India Meteorological Department was created partly in response to major disasters that highlighted the need for improved weather prediction. Over the past century and a half, the institution has developed the capability to provide advance warnings for cyclones, extreme rainfall events, and severe heat conditions.

These forecasting improvements have contributed to saving countless lives by ensuring that timely information reaches vulnerable populations before disasters strike. However, Mohapatra stressed that forecasts alone cannot eliminate risk. Early warnings have limited value if transportation networks are already damaged or if vulnerable communities lack the resources necessary to adapt to changing conditions.

He noted that while science can provide advance notice and improve understanding of emerging threats, broader questions of preparedness, infrastructure, resource allocation, and adaptation remain matters of public policy and governance.

The impact of monsoon variability is not distributed evenly. Small-scale farmers without insurance protection, urban communities located on flood-prone land, and mountain populations dependent on rapidly shrinking ice reserves face disproportionately high risks. Experts argue that these vulnerabilities are shaped not only by weather conditions but also by long-standing development and planning decisions.

As climate change continues to alter rainfall distribution, some regions are becoming wetter while others face increasing water scarcity. The evolving monsoon system is exposing the consequences of environmental pressures that have accumulated over decades.

Mohapatra also highlighted the cumulative impact of individual energy consumption, noting that countless small actions contribute over time to broader atmospheric changes. He stressed that the relationship between human activity and climate outcomes often unfolds across decades and geographical boundaries, making the connection difficult to recognize.

The transformation of India's monsoon is emerging as one of the clearest indicators of a changing climate. As extreme weather events become more frequent and rainfall patterns grow increasingly unpredictable, the challenge facing policymakers, scientists, and communities will be to translate scientific understanding into effective preparedness and long-term resilience.