As many parts of Minnesota prepare for a day of potentially severe storms and possible tornadoes, a number of schools in Minnesota have already announced early closures and pulled the plug on after-school activities.

Severe thunderstorms will rumble across a large swathe of the U.S. Monday into the evening, with the most destructive potential in the upper Midwest. On Monday, 36 million people are under the risk of severe storms from northern Minnesota to southwest Texas,