High Humidity in Assam Challenges India's Heatwave Criteria
High Humidity in Assam Challenges India's Heatwave Criteria
IN · Published Oct 8, 2026
• Assam is experiencing rising temperatures and high humidity levels that challenge India's conventional heatwave thresholds.
• While the India Meteorological Department (IMD) typically declares heatwaves based on dry-bulb temperature criteria, Assam's humid climate amplifies heat stress even when temperatures do not meet these thresholds.

Impact & Risks

The combination of high temperatures and humidity in Assam poses significant risks to public health, particularly for vulnerable groups such as children, the elderly, and outdoor workers. High humidity slows sweat evaporation, making it harder for the body to cool down, which can lead to heat-related illnesses. Urban areas like Guwahati are experiencing expanding heat islands, while Silchar is emerging as a critical heat-risk zone. The lack of a state-level Heat Action Plan (HAP) further exacerbates the risks, leaving the population unprepared for extreme heat events. Additionally, children are particularly vulnerable, with studies showing increased exposure to heat-stress days due to climate change.

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