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The country's northern and eastern power grids are down. It's one of the biggest blackouts in history.
Commuters wait for buses after the Delhi Metro rail system loses power. Indian government officials say the grids went down after being overloaded.
A New Delhi railway station.
Power was lost in India's capital, New Delhi, and other major cities, including Kolkata.
Passengers were stranded outside and inside the trains.
A soldier stands guard at the entrance to the Rajiv Chowk underground metro station.
Fuel station employees manually fill containers with diesel.
The power outage also led to a massive traffic jam.
Souvenir shop owners use portable power generators in Janpath Market, a popular tourist shopping area.
Muslim girls study by candlelight in a religious school in Noida.
More stranded passengers wait for power to get restored. This was Monday, before the eastern grid collapsed along with the northern grid.
A newly wed woman waits for her train at the New Delhi railway station.
It's unclear when the power grids, which are operated by the government, will return to operation.