IMD will calculate HI or "real feel" using multiple models that will factor in the day's relative humidity, wind speed, maximum temperature, and cloud cover.
A colour-based warning-yellow, orange or red-will also be issued, based on the expected HI, listing precautions people can take.
IMD will utilise the data it gathered from weather stations across the country during a heat hazard analysis last year to prepare this HI. The model will be shared with all regional meteorological centres across the country, with the aim to release HI data this monsoon, officials said.
Hindustan Times regularly published Delhi's heat index and wet-bulb temperature (a combined measure of heat and humidity of a region) all of last summer, finding the heat index to be 5-10 degrees higher than the actual maximum of the day in several cases. For instance, on June 27, 2022, when the maximum temperature in Delhi was 40.2 degrees Celsius (C), humidity of 45% pushed the wet-bulb temperature to 52°C. Exposure to a sustained wet-bulb temperature of 35°C or higher can be dangerous even for healthy people.
This story is from the March 28, 2023 edition of Hindustan Times.
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This story is from the March 28, 2023 edition of Hindustan Times.
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