A thick blanket of smog continued to smother Delhi-NCR on Saturday, pushing the Capital’s 24-hour average air quality index (AQI) to 431, in the Severe category, prompting the authorities to impose the strictest anti-pollution curbs under Graded Response Action Plan Stage 4 (GRAP 4). Delhi’s 24-hour average AQI went up to 457 at 10 pm, as per CPCB data.

The Delhi Directorate of Education directed all schools to conduct classes for students up to Class IX and XI in a hybrid mode in light of the deteriorating AQI. This decision follows an order issued by the Commission for Air Quality Management (CAQM), which invoked Stage IV actions under GRAP.

The hybrid model is applicable to schools in Gurgaon, Faridabad, Ghaziabad and Gautam Buddha Nagar as well, a CAQM order stated.

In an official

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