• Delhi AQI reaches 386 in the ‘very poor’ category on November 19; 16 of 39 stations report ‘severe’ AQI above 400
• Greater Noida is worst at 450 AQI; Ghaziabad is 435, Noida is 410; 38 of 39 centres on red alert with readings of 300-500
• Wazirpur highest in Delhi at 447; Bawana 444, Jahangirpuri 442, Chandni Chowk 438 exceed safe air quality standards
• GRAP Stage III restrictions active; health experts warn life-threatening conditions affecting respiratory and cardiac systems