Strong thunderstorms pounded the Kansas City, Mo., area, overnight, downing trees, filling waterways and leaving thousands powerless, officials said Tuesday.

The line of storms packed hurricane-force, straight-line winds that uprooted trees, damaged foundations and tossed cars across the road, KMBC-TV, Kansas City, reported. Utility companies along the storms' path reported thousands of customers were without electrical power.

In Tonganoxie, Mo., at least 6 inches of rain fell, while Olathe got 2 inches of rain in a 45-minute period, running off quickly into creeks, streams and rivers, KMBC said.

After plaguing portions of the western and central Plains states, the storms shifted eastward Tuesday, AccuWeather.com reported. The threat of drenching showers and severe storms extended from the eastern Plains to the mid-Mississippi Valley and the Southeast.

While the threat of tornadoes wasn't as high as Monday, AccuWeather.com forecasters said a few isolated twisters were possible.

Nineteen tornadoes were reported across the United States Monday, with one in Colorado damaging airplane hangars and flipping a plane at a private airstrip, officials said.

Forecasters warned that flooding could remain a concern as 2-3 inches of rain could fall over some areas, running into already-swollen streams and rivers.