For Thursday, the Met official has forecast moderate fog during morning hours while the minimum and maximum temperatures are likely to hover between 5 and 20 degrees Celsius, respectively.
According to police, the people were found unconscious at their respective locations in both incidents, with 'angithis' found near them in their rooms.
The foggy conditions resulting in reduced visibility continued to affect rail, road and air traffic during the early hours.
The soldiers, braving harsh weather and bad air quality were seen marching in line with the drumbeats in their uniforms rehearsing for the 75th Republic Day parade.
The Weather Department issued a dense to very dense fog alert for Delhi- NCR on Friday, while earlier the weatherman had also forecast similar fog conditions for several states of the northern region.
Despite an improvement of 39 points, the city's air quality continued to reel under the 'severe' category with an index value of 411 on Sunday.
Delhiites woke up to dense fog in the morning on Friday with a partly cloudy sky and the temperature dropping to below 8 degrees Celcius.
The polar vortex death toll was at least 21 at last count
People in northern Indian states woke to a chilly Sunday morning with fog and haze engulfing cities and forcing in a delay of trains and flights.
