Uttar Pradesh Chief Minister Yogi Adityanath has ordered all schools up to Class 12 to close until January 1 due to a severe cold wave and dense fog. The directive applies to all boards (ICSE, CBSE, UP Board) and emphasizes student safety. Officials are instructed to monitor conditions, ensure adequate arrangements for blankets and bonfires at public places, and maintain functional night shelters for the homeless. District magistrates have flexibility to extend local holidays if weather worsens, with online classes considered.