India, Dec. 24 -- Punjab, Haryana, Chandigarh, Delhi, Uttar Pradesh and Rajasthan will be affected

The ongoing 'cold days' will intensify into a 'cold wave' conditions from December 25, 2019 in several parts of north and north-west India, including Punjab, Haryana, Chandigarh, Delhi and Uttar Pradesh as well as Rajasthan, according to India Meteorological Department (IMD).

The weather agency's cutoff for such conditions is a minimum temperature of at most 10 degrees Celsius for the plains and 0degC for hilly areas. A cold day is defined on the basis of maximum day temperature while a cold wave is defined by looking at minimum temperatures recorded on two consecutive nights.

The departures in temperatures for both extreme events are 4.5...