The pollution level in the capital of India reached the 500 index!
Because of the smog, schools have been closed, say press agencies all over the world.
Eyewitnesses describe the city as a smoke chamber.
Also, people with heart or respiratory problems are advised to stay in their homes.
“People should avoid morning walk or any other strenuous outdoor activity that increases breathing rate,” the authorities said, according to washingtonpost.com.