Severe Heatwaves in Western India: Meteorological Drivers and Policy Imperatives
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The India Meteorological Department (IMD) has issued a severe heatwave alert for Rajasthan and Gujarat, highlighting the increasing frequency of extreme temperature events. This phenomenon underscores the need for robust Heat Action Plans (HAPs) and a deeper understanding of the meteorological drivers behind such climate-induced hazards.
The India Meteorological Department (IMD) has recently issued a severe heatwave warning for parts of Rajasthan and Gujarat, with temperatures expected to soar significantly above normal. A heatwave is defined based on temperature thresholds; in the plains, it is declared when the maximum temperature reaches at least 40°C and the departure from normal is 4.5°C to 6.4°C. A 'severe' heatwave is declared when the departure exceeds 6.4°C.
The current crisis is driven by specific meteorological factors. Predominantly, the influx of dry, hot winds from the northwest, coupled with high solar radiation under clear sky conditions, creates a 'heat dome' effect. Furthermore, the absence of moisture-bearing winds or active Western Disturbances has prevented any cooling effect, leading to stagnant hot air masses over the western corridor of India. This is exacerbated by the 'urban heat island' effect in rapidly growing cities within these states.
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This article was curated using AI. While we strive for accuracy, please verify critical facts from official sources.