As the minimum temperature in Delhi dropped to 10 degrees Celsius, the season's lowest so far, the IMD said it will declare a cold wave in the city if the situation persists for another day
The national capital recorded a minimum temperature of 11.4 degrees Celsius on Sunday morning, the lowest this season so far, according to the India Meteorological Department
The minimum temperature in parts of Delhi varied with 2.5 degrees Celsius being recorded at Ayanagar, 3.2 degrees Celsius at Palam and 3.6 degrees Celsius at Safdarjung.
Researchers say reasons may include emotional stress associated with holidays