Several Indian states, including Punjab, Uttar Pradesh, and Delhi, have extended school holidays due to a severe cold wave and dense fog. Punjab schools will remain closed until January 13, reopening on January 14, a decision aimed at ensuring student and staff safety. Other regions like Delhi have extended closures until mid-January, with some areas in Uttar Pradesh closing schools up to Class 8 until January 10. These measures are in response to plummeting temperatures, poor visibility, and associated health risks.