The worst snowstorm to hit Britain in 18 years forced the cancellation of more than 650 flights at London's Heathrow airport Monday and shut down the city's bus network, partially paralyzing the British capital. Heathrow, one of the busiest transport hubs in the world, closed both its runways for more than two hours Monday morning and operated with just one for the rest of the morning, according to BAA, the company which runs it. London City airport is also closed, while the British capital's other two airports, Stansted and Gatwick, were operating with severe delays, BAA said. British Airways canceled all flights out of Heathrow until 5 p.m. except for Edinburgh and Lisbon routes, CNN reported.
