Schools in New Delhi were ordered to close for a week as India's capital suffers from dangerously high levels of air pollution.

A couple visits the Mehtab Bagh complex behind the Taj Mahal amid smoggy conditions in Agra, India, Nov. 16, 2021.

Government offices were asked to operate from home and private businesses were advised to stick to work-from-home options as much as possible.

A couple visits the Mehtab Bagh complex behind the Taj Mahal amid smoggy conditions in Agra, India, Nov. 16, 2021.

Commuters are seen in the early morning as heavy smog engulfed India Gate in New Delhi, India, Nov. 12, 2021.

A view of ITO engulfed in thick smog in New Delhi, India, Nov. 15, 2021.

Morning haze and smog envelop the skyline in New Delhi, India, Nov. 5, 2021.

A worker is seen next to an anti-smog gun near the ongoing redevelopment project on Rajpath, on a smoggy day in New Delhi, India, Nov. 12, 2021.

A man rides a cycle on a foggy morning near AIIMS in New Delhi, India, Nov. 15, 2021.

Early morning walkers on a smoggy morning at Deer Park in New Delhi, India, Nov. 12, 2021.

Men (L) pray at the banks of the Yamuna River near the Taj Mahal amid smoggy conditions in Agra, India, Nov. 16, 2021.

A view of Connaught Place covered with heavy smog and foggy weather in New Delhi, India, Nov. 12, 2021.

Commuters drive along a road amid heavy smog conditions in New Delhi, India, Nov. 11, 2021.

A view of Akshardham engulfed in thick smog in New Delhi, India, Nov. 15, 2021.

A view of heavy smog during a cold winter morning in Ajmer, Rajasthan, India, Nov. 14, 2021.

An anti-smog gun operates along a road in a bid to curb air pollution, in New Delhi, India, Nov. 8, 2021.

An office complex building is seen shrouded in smog in Noida on the outskirts of New Delhi, India, Nov. 15, 2021.

A man rows a boat as buildings shrouded in smog are seen in the background on the outskirts of Delhi, India, Nov. 15, 2021.

A couple poses during a pre-wedding photoshoot near India's Presidential Palace, which is shrouded in smog, in New Delhi, India, Nov. 5, 2021.

A view of heavy smog during the cold winter morning in Ajmer, Rajasthan, India, Nov. 14, 2021.

Buildings are seen shrouded in smog in New Delhi, India, Nov. 16, 2021.