India, Jan. 22 -- Delhi's air quality remained "very poor" on Thursday even as the minimum temperature of 6.3degC was a degree below normal, and a western disturbance approaching the region was expected to cause light rain on Friday. On Wednesday, Delhi recorded a minimum temperature of 7.7degC.

An Average Air Quality Index (AQI) of 313 (very poor) was recorded at 8am on Thursday, compared to 330 (very poor) at 4pm on Wednesday. Wind speeds were expected to increase on Friday, improving the air quality.

The Indian Meteorological Department (IMD) has issued a yellow alert for Friday for thunderstorms and gusty winds of 30-40 km per hour and light rain.

Cloudy skies and rain were expected to keep the minimum temperature in check and the ...