A busy stretch of severe thunderstorms is underway due to record heat and now the threats are ramping up, putting major metro areas from Chicago to Nashville under threat as the country hits the peak of tornado season.

The threat of tornadoes looms over much of Minnesota Thursday as severe storms blow across the state and into western Wisconsin.

Baseball-sized hailstones pelted the Midwest and multiple tornadoes touched down as the latest round of severe weather raced through the Midwest on Thursday evening. Over 50,000 are without power.