Dense fog engulfs Delhi-NCR, disrupts train services and daily life

Dense fog blankets Delhi-NCR, disrupting train services with 41 trains delayed. Minimum temperature in Delhi is 10°C, AQI marked at 'very poor.' Night shelters set up for homeless. Fog impacts parts of North India, including Punjab, Haryana, UP, North Rajasthan. Rainfall expected from January 21 over the Western Himalayan region.