Delhi's Air Turns 'Choking' Again: AQI Crosses 400 in Many Areas

• Delhi's air quality deteriorated rapidly, reaching 'severe' category with AQI crossing 400 in many areas after two days of relief.
• Average AQI hit 385 ('Very Poor') on Saturday, rising from 234 on Thursday, with some areas near 500 on Sunday morning.
• Major hotspots include Shadipur, Vivek Vihar, Ashok Nagar, Bawana, Chandni Chowk, Dwarka, Mundka, and ITO.
• Vehicular emissions (16.2%) are Delhi's largest contributor; Jhajjar (17.5%) is the biggest external source.
• Slow winds, low temperatures, and high humidity are trapping pollutants, leading to dense smog and fog, worsening the situation.

Why It Matters: Delhi's air quality worsened significantly post-GRAP-4, with high AQI due to local emissions, external sources, and adverse weather.