LOS ANGELES, June 21 (Xinhua) -- North Dakota Governor Kelly Armstrong declared a statewide disaster on Saturday after three people were killed in a violent tornado that tore through the Upper Midwest ...

龙卷风。图片由 Justin1569 提供，位于英语维基百科，CC BY-SA 3.0 http://creativecommons.org/licenses/by-sa/3.0/，来自 Wikimedia Commons。 几个 ...

Forecasters warned of potential for "all severe hazards," including tornadoes, especially in the central and southern Plains. The National Weather Service in Wichita, Kansas, warned that severe ...