On November 17, the India Meteorological Department (IMD) warned of a cold wave in parts of Telangana. The nighttime temperatures have fallen into single digits in many locations. Kohir and Yalal districts recorded around 8.1º C while Adilabad, Medak, Kumaram Bheem Asifabad, Nirmal, and Sangareddy have reported minimum temperatures between around 8º and 10º C — all well below what is normal for this time of year. The IMD has issued a cold wave alert for the latter five districts on November 18, with similar conditions expected on November 19.

What is a cold wave?

The IMD has a precise rule for when the term ‘cold wave’ can be used. For plains regions like Telangana, a cold wave is said to occur when the minimum temperature is 10º C or lower and at least 4.5º C below the long-term norma

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