Delhi's air quality plummets to a severe AQI of 438, causing hazardous smog and prompting emergency pollution control measures.

Exposure to this level of pollution can cause serious health problems, experts say.

Thick smog blankets Delhi as air quality reaches 'severe' levels, prompting urgent pollution control measures across the city.

Delhi's air quality plummets to a severe AQI of 438, causing hazardous smog and prompting emergency pollution control measures.

Delhi's air quality remains 'very poor' with an AQI of 366, impacting health and visibility, forecasted to persist.