Thick Smog Blankets Delhi After Diwali, AQI Turns Severe
On Diwali night, heavy smoke covered Delhi and its surrounding region, and the overall air quality index reached 373, in the very poor range. Monitors at 20 stations recorded severe levels. The government's early warning system expects the air to slip into the severe category from November 9 and stay there for several days.
Context
Context: Delhi's air gets worse most winters because cold, still air traps smoke from vehicles, industry and crop burning in nearby states. Authorities respond with GRAP, a staged set of curbs that tighten as pollution rises.