The coronavirus problem that India had feared is becoming reality in Mumbai. It is India’s most densely populated city, a scraggly peninsula framed by the Arabian Sea and other waterways, a metropolis of towering apartment blocks and endless slums, a city of oversize dreams and desperate poverty, all sandwiched together. This is where Asia’s richest man, Mukesh Ambani, built a 27-story single-family home. This is where “Slumdog Millionaire” was filmed and set. Indians call it Maximum City.

Particularly in the city’s vast slum districts, social distancing is impossible. People live eight to a room across miles and miles of informal settlements made of concrete blocks and topped with sheets of rusted iron. As the temperatures climb toward 100 degrees Fahrenheit, many can’t stand to be cooped up anymore and spill into the streets. For the past eight weeks, Atul Loke, a second-generation newspaper photographer, has been tracking the spread of the coronavirus across his city. Here is what he has seen.