Delhi experienced severe smog and low visibility on Sunday, with pollution levels reaching their highest this year. Over 400 flights were delayed, and schools were ordered to start classes after 9am. The weather office predicted further fog and cold temperatures for Monday and Tuesday. The city's air quality index worsened to its worst January level in three years, prompting restrictions on older vehicles and private constructions. Experts warned that the polluted air could cause serious long-term health issues for all residents and particularly vulnerable groups. | Latest News India