NEW DELHI: Toxic air in parts of India's capital New Delhi soared to more than 58 times the World Health Organisation's recommended daily limit Monday, after fireworks for the Hindu festival of Diwali, air monitor data showed.

Millions celebrate the annual festival of lights with fireworks in one of the world's most polluted capitals, worsening winter smog fuelled by vehicle emissions, farm fires and industry.

The Supreme Court this month allowed the limited use of so-called "green" firecrackers, designed to produce fewer emissions, during Diwali.

But restrictions are routinely flouted, with the city reverberating with explosions.