Indian authorities are warning that Delhi has turned into a “gas chamber” with toxic smog blanketing one of the world’s most populated cities. Officials have declared a public health emergency and are distributing over 5 million gas masks to residents, who are worried about the physical and psychological impact of the pollution.

Delhi resident: “Apart from breathing issues, pollution is also pressurizing us psychologically. That’s what’s happening now. It’s not winter, so it’s definitely not fog. We’re walking around with masks.”