Goa, Oct. 31 -- Nathula Pass area, on Friday, sending temperatures in Sikkim plummeting to sub-zero levels. The sudden weather change disrupted movement along key mountain routes and prompted authorities to issue a red alert. According to the India Meteorological Department (IMD), heavy to very heavy snowfall was reported in Nathula, Kupup, and Tsomgo (Changu) Lake since early morning. The IMD warned of continued severe weather conditions over the next 24 hours. Tourists and transport operators have been advised to avoid high-altitude travel as several routes remain slippery due to snow accumulation. Border Roads Organisation (BRO) teams are clearing the snow to restore movement and maintain essential connectivity. Officials said the Nath...