Southern India has grown wetter over seven decades, finds IMD study

The India Meteorological Department analysed temperature and rainfall records spanning seven decades to map climate shifts across the subcontinent. In the southern peninsula, areas that were once characterized by low precipitation and high temperatures have experienced a steady increase in rainfall, leading to a contraction of the hot semi‑arid belt by almost half. The newly identified tropical savanna climate brings longer wet seasons and a higher likelihood of intense monsoon bursts, altering the traditional agricultural calendar for crops such as millets and pulses.

Conversely, the study highlights a contrasting trend in north‑west India, where reduced rainfall and rising temperatures have intensified aridity. Regions that depend heavily on groundwater for irrigation are facing heightened stress, prompting concerns about the sustainability of wheat and cotton production. The shift in climate zones underscores the need for adaptive water management strategies, including rainwater harvesting and the adoption of drought‑resistant crop varieties, to mitigate the impact on food security.

For Indian readers, these findings are relevant because they illustrate how climate change is reshaping the environmental conditions that underpin daily life, from farming to urban water supply. The wetter south may reduce the frequency of droughts but could also increase flood risk in low‑lying areas, while the drying north‑west threatens livelihoods that rely on rain‑fed agriculture. Policymakers and citizens alike must consider these divergent trends when planning infrastructure, disaster preparedness, and long‑term resource allocation.