On February 4, many parts of Himachal Pradesh and Uttarakhand received fresh snowfall, resulting in heavy traffic and road blockage because of the accumulation of snow. Flight operations in Srinagar were affected for the second day on February 4 due to heavy snowfall and poor visibility. Even Delhi witnessed light rain and many parts of the city also saw thunderstorms in the evening. According to India Meteorological Department (IMD), temperatures increased in Delhi under the influence of a passing western disturbance, and as strong winds blew over Delhi-NCR, pollution levels started abating. The overall air quality index (AQI) of Delhi on February 4 was 316, in the “very poor” zone, an improvement from the previous day’s 330.
Source- Hindustan Times.0