'Bomb Cyclone' Causes Evacuation In Iowa As Tornadoes Strike Central, Southern United States

A rare phenomenon known as a "Bomb Cyclone" caused residents of Hornick, Iowa to evacuate, and several states are reeling from tornado damage across the central and southern United States this week.

The "Bomb Cyclone" began with hurricane-force winds in Colorado, before heading east and bombarding Iowa and Nebraska. A "Bomb Cyclone" occurs when there is a rapid drop in atmospheric pressure over 24 hours.

Around 105 million people are on on some sort of watch, like a severe storm warning or evacuation orders. 

Severe storms broke a levee, causing residents of Hornick, Iowa, to evacuate. Hornick is about 25 miles southeast of Sioux City.

See what the National Weather Service recommends you do when a tornado is in your path. 

Kentucky, Michigan, Indiana and Alabama all reported intense tornadoes in Thursday. Fortunately, there appears to be no death toll associated with any of the storms, though emergency crews are still digging through wreckage and debris. 

Multiple tornado warnings were issued for parts Kentucky, Indiana and Illinois throughout parts of Thursday, while segments of Ohio were under a tornado watch as well. The National Weather Service's office in West Paducah, Kentucky, was nearly destroyed by a tornado Thursday, according to the agency. 

Flash flooding caused the closure of several state highways in Kentucky, according to multiple reports. 

Colordao received the brunt of the storm. Thousands were left without power in Denver, and thousands of flights were cancelled. 

Nearly 100 drivers and a pair of doges were rescued by Colorado National Guards, as the group searched about 250 vehicles stranded on roadways in central Colorado. The El Paso County Sheriff's Department said about 150 vehicles stuck midday Thursday.