New Delhi: India reported one of its hottest summers in 2022, recording 203 heatwave days, the highest in recent times. This year the highest number of such cases were reported from Uttarakhand (28), followed by Rajasthan (26), Punjab and Haryana (24 each), Jharkhand (18) and Delhi (17).
The figure of 203 was arrived at after adding the average number of states scorched during the summer. The average number of heatwave episodes across states, shared by the Ministry of Earth Sciences in LS on Wednesday, shows that the total number of heatwave days in the country this year was five times more than in 2021 with Punjab having such episodes (36). Haryana reported 12 times more heatwave days in 2022 than last year, when each of these two states recorded only two heatwave days. Data shows that Assam, Himachal and Karnataka do not have a single heatwave day this year.
Qualitatively, a heatwave is a state of air temperature that becomes lethal to the human body when exposed, whereas quantitatively, it is defined by the actual temperature or the temperature range in an area in terms of its departure from normal. is done. According to the IMD, if the maximum temperature of a station reaches at least 40°C or more for plains and at least 30°C or more for hilly areas, it is considered a heatwave.
A heatwave can be described in coastal areas when the maximum temperature is 4.5 °C or more above normal, provided the actual maximum temperature is 37 °C or higher. Heatwaves in India are occurring mainly during March to June and in some rare cases even in July. May is the peak month of heat wave in India.
“India experienced a prolonged heatwave during March and April 2022. Therefore, the mean maximum temperature of March 2022 was the highest for all India (33.1 °C) and North-West India (30.7 °C) and it was second The highest temperature was in Central India (35.2°C) as per the data for the period 1901 to 2022,” said Jitendra Singh, Minister of Earth Sciences in Lok Sabha. “Abnormal temperature events can place severe physiological stress on the human body because the body functions best within a fairly normal temperature range. There is a notable relationship between human mortality and thermal stress,” he said.