All schools in the capital will remain shut till Sunday due to alarming levels of pollution, Delhi Deputy Chief Minister Manish Sisodia announced on Wednesday.

‘Delhi’s air quality is getting worse. In this situation, there can be no compromise on children’s health,’ Sisodia, also the Education Minister, said in a tweet.

A dense fog covered the national capital on Wednesday with the minimum temperature recorded at 14 degrees Celsius, normal for the season. Visibility stood at 300 metres.

‘There was moderate to dense fog in the morning. The sky will remain mainly clear ahead,’ said an official of the India Meteorological Department.

The humidity at 8:30am was 98 per cent.

Tuesday's maximum temperature settled at 30.2 degrees Celsius, one degree above season's average, while the minimum was recorded at 16.2 degrees Celsius, three notches above the season's average.