These houses are dangling over a swelling river outside Oklahoma City

CNN

CNN just had a drone up above the surging Cimarron River outside of Oklahoma City, and it showed two houses that were falling, piece by piece, into the water.

A number of residents living along the river evacuated last night, CNN affiliate KOCO reported, in advance of the flooding. Their homes were known to be at risk due to erosion from the flood waters.

Ricky Jarvis was out stormchasing as a series of strong cells moved through Missouri.

In the dark, lightning illuminates what appears to be a number of tornadoes dropping from the clouds above.

Watch his video:

The wail of tornado sirens are eerie enough. They're made even more scary when sparks and flashes from power lines snapping in the distance are visible.

Bret Powell, Jr. took video that shows just that.

The same tornado that tore through Jefferson City, Missouri was moving through Eldon, Missouri.

Listen:

There was lightning and thunder when Jaclyn Morrow stepped onto the patio outside her basement overnight.

She was taking a simple video of the lightning and thunder in Eugene, Missouri when distant lightning illuminated a horrific silhouette.

On the horizon, about 40 seconds into the video below, you can see the massive wedge tornado that tore through Jefferson City, Missouri.

Watch:

Missouri, Oklahoma and other areas hit with severe weather this week are not out of the woods yet.

Today tornadoes could pose threats from Lubbock, Texas, to the Kansas City area and from Columbus, Ohio, to Philadelphia, according to CNN meteorologist Haley Brink.

Here's a look at the areas most at risk of extreme weather today:

And severe weather will continue for these areas tomorrow:

There's a flood risk, too: Serious river flooding — including along the already swollen Mississippi River — is expected as more rain falls over the region in the next few days.

Storms blew across Missouri last night, spawning tornadoes that tore through towns and cities.

Daylight is revealing the extent of the damage, and officials are telling the public to stay out of affected areas.

CNN's Jake Carpenter

Jefferson City, Missouri, is waking up this morning after a massive tornado hit the city overnight. Some residents are getting their first look at the damage now.

The tornado's funnel was wider than its height, and hit shortly before midnight Wednesday, sending debris as high as 13,000 feet into the air, according to the National Weather Service.

No deaths had been reported as of Thursday morning, Jefferson City police Lt. David Williams said, but at least nine people were transported to area hospitals in the city, Missouri Department of Public Safety spokesperson Mike O'Connell said early Thursday.