New Delhi, Dec. 28 -- Air quality in Delhi has deteriorated to hazardous levels, authorities said here on Sunday, raising serious health concerns for the city's residents.

The Central Pollution Control Board (CPCB) indicate that the Air Quality Index (AQI) in several parts of the capital has exceeded 400, placing it in the hazardous category. Health experts have advised people, especially children, the elderly, and those with respiratory or heart conditions, to avoid outdoor activities and limit exposure to polluted air.

Authorities have urged residents to wear masks when stepping outside, use air purifiers indoors, and follow safety guidelines to minimise the health impact. The Delhi Pollution Control Committee (DPCC) and related agenc...