US extreme weather disrupted traffic increasing

- Rare 'winter tornadoes', floods and snowstorms in the United States undertakes to transport more and more flat. The extreme weather has a major impact on air traffic. Nearly 3,000 flights were canceled Monday around midnight (local time). Another 4,000 flights had been delayed.

It's not just tornadoes and heavy rains, the country also has to contend with hail and sleet. That is particularly the case in Chicago where many hundreds of aircraft not ascended. The extreme conditions occur during one of the busiest travel periods in the US Many people are there with the Christmas break gone, or do it now because of the approaching New Year.

The prospects are not very flourishing: warns include Alabama tornadoes, while in the states of Missouri and Illinois there is a risk of flash flooding. In other parts of the country, as in Iowa, Nebraska and Wisconsin, is a lot of snow expected. The bad weather in the US has already cost more than forty lives.