A cold wave has intensified in most parts of north India, with temperatures in the Kashmir Valley dipping below freezing point. The national capital saw a brief respite from the bitter cold during the day, but cold conditions persisted in parts of Rajasthan and Himachal Pradesh. The weather department has issued a yellow warning for cold wave, ground frost and dense fog for some places in Himachal Pradesh. There is a possibility of rain and snowfall in parts of northwest India later in the week.