(CNN) -- Rescuers have removed the body of a man buried under flood debris west of Colorado Springs, Colorado, one of several areas where heavy rains have caused fatal floods over the past week.

The National Weather Service say more showers and thunderstorms are expected through the weekend in states ranging from the Pacific Northwest to the deep South. In Colorado, slow-moving, heavy rain could wreak even more havoc by way of flash flooding as it falls on saturated and unstable soils in the area plagued by last year's devastating Waldo Canyon wildfire.

Friday's fatality came amid a flash flood and mudslide near the town of Manitou Springs, Colorado, that swept away cars and washed out parts of a state highway. The man's body was found beneath "significant amounts of debris" left on Colorado Highway 24, the El Paso County Sheriff's Office said.

Video of the mudslide showed cars sliding swiftly down an incline while others remained stranded in rushing, grey-colored water. The victim had not been identified Saturday.

Flash flood watches and warnings, as well as flood watches and warnings, were in effect for 12 U.S. states from Washington and Oregon to parts of coastal Georgia and South Carolina. The most severe threats are in Missouri, Arkansas and Tennessee.

In Oklahoma, floodwaters swept away and killed a man who was trying to save his daughter from a stranded vehicle early Friday. The 60-year-old man was washed away by fast-moving floodwater that had rapidly appeared in Oklahoma City overnight, city police Lt. Gamille Hardin said.

His daughter had been stuck in a vehicle surrounded by rapidly rising water, Hardin said.

In South Carolina, Logan Dale Evans was found dead in floodwater on his family property Wednesday night near the town of Central, Pickens County Coroner Kandy Kelley said.

Evans, 23, was found outside his vehicle, which ended up about a mile downstream, said Kelley, who added that Evans is believed to have drowned.

At least two people were reported killed in Missouri this week, including a driver who was caught in rapidly rising water in McDonald County on Thursday, said Gregg Sweeten, the county's emergency management director. The woman, thought to be in her 60s, had been trying to drive over a bridge when the water overwhelmed her vehicle, Sweeten said.

On Monday, Elijah Lee, 4, died after 6 inches of rain fell on Pulaski County, about 140 miles southwest of St. Louis. The boy was found in a vehicle swept up in floodwater that caught the community along Mitchell Creek off guard, said Sgt. Dan Crain, a Missouri Highway Patrol spokesman.