The dense fog that lasted for nearly 11 hours on Sunday hit flight and rail operations in the Capital leaving thousands of passengers waiting for hours, airport and railway officials said.
Visibility dipped below 200 metres at 12.30 am and was zero for nearly seven-and-a-half-hours between 3am and 10.30am — leading to around 400 flights being delayed at the airport, 10 getting diverted and at least 20 getting cancelled, officials said.
The cascading effect of delays continued till the evening even though sunlight improved visibility for five hours, from 12pm to 5pm.