Fog disrupts train services in Delhi; 19 trains running late

Fog disrupted train services in Delhi, with 19 trains running late. Defence personnel held their parade rehearsal amid foggy conditions. Delhi's temperature dropped to 12.6 degrees Celsius, and air quality remained in the 'very poor' category. Fog also impacted other North Indian regions, including a cold wave in Kashmir and Prayagraj's Maha Kumbh Mela engulfed in fog.