New Delhi, Nov. 14 -- Delhi recorded a third consecutive day of 'severe' air on Thursday, with AQI readings consistently breaching the 400 mark. Yet the Centre's Early Warning System (EWS) - the model that triggers Grap measures - forecast only 'very poor' air for Tuesday, Wednesday and Thursday, underscoring a widening gap between projections and actual pollution levels.

On Monday, EWS predicted 'very poor' AQI for Tuesday, yet Delhi slipped into 'severe'.

On Tuesday, it projected 'very poor' air and an improvement on Wednesday; the AQI dropped marginally but stayed 'severe'.

Wednesday's bulletin again expected 'very poor' air for Thursday, but the AQI remained above 400.

As per CPCB, an AQI above 400 is "severe", 301-400 "very poor"...