KANSAS CITY, Mo. (AP) — The National Weather Service has issued flash flood watches and advisories across parts of Kansas, Missouri and Oklahoma after a night of heavy rain.

In Kansas, wind gusts of more than 70 mph downed trees and power poles Thursday night. The storm left about 9,500 Westar Energy customers without power in the Emporia area at the peak of the storm, leading to school closures.

In Missouri, the state's transportation department is reporting that about 40 roads are closed because of flooding, mostly in the western party of the state.

The Missouri Levee and Drainage District A...