The Delhi government has extended the closure of schools up to class 5 till November 10 due to high pollution levels. Some schools in Noida have also stopped outdoor activities and switched to online classes. Delhi is facing record-breaking levels of air pollution, and scientists predict it will remain severe until the end of the week. The accumulation of toxic haze is due to falling temperatures, stagnant winds, and post-harvest stubble burning in Punjab and Haryana.