More than 10 million people across the Midwest remain under flood alerts Monday morning as heavy rainfall continues to pummel parts of Wisconsin, Oklahoma, Kansas and Missouri, triggering flash flooding in Milwaukee that has forced the Wisconsin State Fair to cancel its last day.

The National Weather Service is cautioning people of "life threatening" flash flooding in County during the early morning hours on Sunday, Aug. 10.

It was the second consecutive day of flash flooding in Milwaukee. On Saturday night, flash flooding prompted authorities to close the Wisconsin State Fair State Fair Park in the Milwaukee suburb of West Allis and cancel the final day of the fair on Sunday, authorities said.