Illegal subsidiary wires are attached to the main cables on an electric pole in New Delhi, August 1, 2012. An estimated 620 million people were left without electricity Tuesday afternoon after India’s northern, eastern and northeastern grids cascaded into failure. AP

High-tension electric towers stand as traffic moves slowly on the outskirts of New Delhi. AP

A man rides a motor scooter past a power station on the outskirts of New Delhi. AP

A mechanic repairs a car next to an electric pole which has illegal subsidiary wires attached to the main cables in New Delhi. AP

Commuters exit an underground metro station where services were fully restored after Tuesday's power outage in New Delhi. AP

Passengers wait near a parked train for the services to resume following a power outage at a railway station in New Delhi. AP

A man prepares meal as others sit at a roadside shop on a dark street following a power outage near a railway station in Allahabad. AP

Passengers wait for the train services to resume following a power outage in New Delhi. AP

Commuters wait for a bus on a street illuminated with street vendor's kiosks following a power outage in Kolkata. AP

A girl looks out from a stalled train window as passengers are stranded following a power outage in New Delhi. AP

Stranded passenger sit on railway tracks near a stalled train following a power outage near Nani village in Allahabad. AP

A traffic jam following power outage and rains at the Delhi-Gurgaon road on the outskirts of New Delhi. AP

Pigeons sit on electricity wires along a Metro line after Delhi Metro rail services were disrupted following a power outage in New Delhi. AP

Trains are parked at the New Delhi railway station following a power outage in New Delhi. AP

Commuters wait for buses outside a Metro station after Delhi Metro rail services were disrupted following power outage in New Delhi. AP