: Heat waves: Why even relatively low temperatures with high humidity can prove deadly #IndiaNEWS On July 1, Delhi experienced a heat wave, and the maximum temperature rose to 43.5 degrees Celsius, data

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Heat waves: Why even relatively low temperatures with high humidity can prove deadly #IndiaNEWS
On July 1, Delhi experienced a heat wave, and the maximum temperature rose to 43.5 degrees Celsius, data from the India Meteorological Department at the Safdarjung Observatory show. On July 1, Ganganagar in west Rajasthan reported India’s highest temperature of 44.5 degrees Celsius.Some pockets of Punjab, Haryana, Chandigarh, Delhi, northern Rajasthan and western Uttar Pradesh are likely to continue to face heat wave conditions, according to an all India weather forecast bulletin by the India Meteorological Department on July 2.But the world is not only getting hotter but also more humid, said a 2017 study, and in vast parts of India, humidity combined with heat is deadlier for human health and wellbeing.This combined scientific measure of heat and humidity is called the “wet-bulb temperature� that can be high even when the temperature is relatively low. For instance, if the temperature is 30 degrees Celsius and relative humidity is 90%, the wet-bulb temperature amounts to a very uncomfortable 29 degrees Celsius, as per this calculator, we reported in August 2017.Physical labour – such as on farms, where 48.8% of Indians work – becomes unsafe in such conditions, and can prove fatal.But the India Meteorological Department continues to only track temperatures rather than wet-bulb temperatures for its predictions and advisories. The latter is a more accurate “measure...Read more

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