In Delhi-NCR, the sharp drop in the minimum temperature which caused the air quality to turn severe will remain so till today, hence physical outdoors should not be encouraged.
"Overall air quality in Delhi is in the severe plus zone and it is expected to remain in that range until tomorrow. Thereafter, it will start to improve slowly and may touch 'very poor' category," System of Air Quality and Weather Forecasting And Research (SAFAR) said in its forecast.
Delhi recorded the coldest morning on Sunday in December with the minimum temperature dropping to 3.7 degrees Celsius but the Met predicted an increase in temperature over the next few days.
The fall in temperature has also led to moderate to dense fog during the morning with visibility in Safdarjung area observed around 300 metres at 8.30 a.m.
As per the IMD, Monday will witness moderate to dense fog in the morning and haze later in the day.
"The rest of the day will be partly covered with clouds with the maximum temperature reaching 23 degrees Celsius and the minimum hovering around 5 to 6 degrees Celsius," the Met said.
"Instead use N-95 or P-100 respirators when stepping outdoors."