The scorching heat is going to return once again in North and Central India. According to weather experts, from June 8, the temperature will rise rapidly in many parts of Punjab, Haryana, Rajasthan, Delhi-NCR and Uttar Pradesh and the mercury may reach 46 degrees Celsius in some areas. The most intense effects of heat can be seen around June 10 and 11.
According to independent meteorologist Navdeep Dahiya, after slight relief in the last few days, the effect of hot winds has started increasing again in North India. The maximum temperature during the day is likely to be between 42 to 46 degrees Celsius.
Why is the heat increasing?
According to meteorologists, the main reason for the rapid increase in temperature this time is the hot and dry winds coming from the north-west direction. In scientific language it is called “Advection”, i.e. movement of heat from one place to another through air.
These winds pass through the Thar Desert and dry areas of Rajasthan and bring with them more heat along the way. These are called “Loo” in common language. These winds rapidly remove moisture from both the atmosphere and the human body, making the effects of heat more felt.
‘Heat Dome’ is being built in the sky
Experts say that not only hot winds, but the high pressure area created in the upper atmosphere is also playing an important role in increasing the temperature. This is called an anti-cyclone or “heat dome” condition.
In this situation, due to pressure building up from top to bottom, the air becomes more heated. Also, the possibility of cloud formation reduces, due to which the strong sunlight of June reaches the earth directly and the temperature increases rapidly.
Dry land is also making this situation more serious. Due to low moisture in the soil, most of the sun’s energy is being spent directly on heating the air.
When is heatwave declared?
According to the India Meteorological Department (IMD), when the maximum temperature in the plains reaches above 40 degrees Celsius and is at least 4.5 degrees above normal, or the temperature directly reaches 45 degrees Celsius or above, then it is classified as a heatwave.
According to the current forecast, temperatures in western parts of Rajasthan and Bundelkhand region of Uttar Pradesh can easily cross this limit.
When will we get relief?
Weather experts estimate that a western disturbance may become active around June 13. This weather system coming from the Mediterranean region will bring clouds, light rain and change in wind direction, due to which the temperature may drop by a few degrees.
However, the south-west monsoon is still far away from North India. Monsoon has reached Kerala on June 4, but it will take time for it to reach North India. In such a situation, such short but intense heat waves can be seen for the next few weeks.
Experts have advised people to avoid going out during the afternoon, drink adequate amount of water and adopt measures to prevent heatstroke.
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