The prospect of rain comes as Delhi-NCR continues to struggle with deteriorating air quality during the winter pollution season. New Delhi: Delhi is likely to receive very light rain or drizzle under the influence of a western disturbance Sunday. After the western disturbance passes, the city may record a drop in the. Delhi-NCR air remains very poor with forecasts of light rain; Gurugram tightens fuel rules, Ghaziabad among top polluted districts.