The Commission for Air Quality Management (CAQM) has imposed Stage IV of the Graded Response Action Plan (GRAP) in the National Capital Region (NCR) with immediate effect following a steep rise in air pollution levels. According to ANI, the emergency measure was reintroduced on Monday night after the Air Quality Index (AQI) in Delhi breached the critical 400 mark.

As per ANI reports, Delhi recorded an AQI of 399 at 9 PM, which worsened to 401 by 10 PM, triggering the stringent Stage IV measures under GRAP. The deteriorating air quality is attributed to a combination of unfavourable meteorological conditions and still wind patterns, which have trapped pollutants in the region.