Photos: Tornadoes Strike Central, Southern U.S. Killed 21

A debris trail, bottom, left when a tornado struck a Vilonia, Ark., neighborhood, leads from the rows of houses Monday, April 28, 2014, after a tornado struck the town late Sunday. (AP Photo/Danny Johnston)

At least 21 people were killed after ferocious storms and tornadoes tore down buildings and causing mass destruction in the southern United States.

Hundreds others were injured.

Most of the deaths occurred on Sunday after tornadoes hit Arkansas and other states.

Monday’s twister in Tupelo, one of several to tear across Mississippi, damaged hundreds of homes and businesses, downed power lines and tore up trees, the National Weather Service said.

After the Monday’s tornado in Tulopo, officials imposed an 8 p.m. (0100 GMT) curfew and in some residential areas were closed off as emergency crews checked downed power lines and gas leaks.

The storm system later pushed into parts of Alabama, where emergency officials said at least two people were killed at a trailer park near Athens, Alabama. 

Arkansas Governor Mike Beebe said at least 15 people had died statewide in the storm. 

Nine of the victims on Sunday came from the same street in Vilonia, a town with a population of about 4,100.

State authorities reported that one person was killed in Oklahoma, one in Iowa and another one in Kansas,

The National Weather Service said the threat of tornadoes will last for several days as a strong weather system interacts with a large area of unstable air across the central and southern United States.

According to AP News, The National Weather Service posted tornado watches and warnings around Mississippi, Tennessee, Alabama and Georgia that were in effect through Monday night.

Here are some photos of the aftermath…

Twisted trees and power lines remain in a residential block near Military Avenue following the tornado in Baxter Springs, Kan., Sunday, April 27, 2014. (AP Photo/The Joplin Globe, Roger Nomer )

A debris trail, bottom, left when a tornado struck a Vilonia, Ark., neighborhood, leads from the rows of houses Monday, April 28, 2014, after a tornado struck the town late Sunday. (AP Photo/Danny Johnston)

A debris trail, bottom, left when a tornado struck a Vilonia, Ark., neighborhood, leads from the rows of houses Monday, April 28, 2014, after a tornado struck the town late Sunday. (AP Photo/Danny Johnston)

A debris trail, bottom, left when a tornado struck a Vilonia, Ark., neighborhood, leads from the rows of houses Monday, April 28, 2014, after a tornado struck the town late Sunday. (AP Photo/Danny Johnston)

A debris trail, bottom, left when a tornado struck a Vilonia, Ark., neighborhood, leads from the rows of houses Monday, April 28, 2014, after a tornado struck the town late Sunday. (AP Photo/Danny Johnston)

Piles of cars and remnants of home are scattered along Cemetery Street in Vilonia, Ark., Monday, April 28, 2014, after a tornado struck the town late Sunday. Vilonia was hit hard Sunday after a tornado system ripped through several states in the central U.S. and left more than a dozen dead in a violent start to this year’s storm season, officials said. (AP Photo/Karen E. Segrave)

A home is covered by debris from a tornado in Baxter Springs, Kan., Monday, April 28, 2014. (AP Photo/Orlin Wagner)

A debris trail, bottom, left when a tornado struck a Vilonia, Ark., neighborhood, leads from the rows of houses Monday, April 28, 2014, after a tornado struck the town late Sunday. (AP Photo/Danny Johnston)

Travel trailers and motor homes are piled on top of each other at Mayflower RV in Mayflower, Ark., April 27, 2014. (AP Photo/Danny Johnston)

A home is covered by debris from a tornado in Baxter Springs, Kan., Monday, April 28, 2014. (AP Photo/Orlin Wagner)

A debris trail, bottom, left when a tornado struck a Vilonia, Ark., neighborhood, leads from the rows of houses Monday, April 28, 2014, after a tornado struck the town late Sunday. (AP Photo/Danny Johnston)

Buildings are damaged along Gloucester Street after a tornado in Tupelo, Miss., Monday, April 28, 2014.T ornados flattened homes and businesses, flipped trucks over on highways and injured numerous people in Mississippi and Alabama on Monday as a massive, dangerous storm system passed over several states in the South, threatening additional twisters as well as severe thunderstorms, damaging hail and flash floods. (AP Photo/The Daily Mississippian, Thomas Graning)

A demolished car sits on North Gloster Street across from what remains of a shell gas station in Tupelo, Miss, after a tornado touched down on Monday, April 28, 2014. At least three tornados flattened homes and businesses, flipped trucks over on highways and injured an unknown number of people in Mississippi and Alabama on Monday as a massive, dangerous storm system passed over several states in the South, threatening additional twisters as well as severe thunderstorms, damaging hail and flash floods. (AP Photo/Jim Lytle)

The remains of the Purvis’ home in Vilonia, Arkansas. (Yahoo News/Jason Sickles)

Buildings are damaged along Gloucester Street after a tornado in Tupelo, Miss., Monday, April 28, 2014.T ornados flattened homes and businesses, flipped trucks over on highways and injured numerous people in Mississippi and Alabama on Monday as a massive, dangerous storm system passed over several states in the South, threatening additional twisters as well as severe thunderstorms, damaging hail and flash floods. (AP Photo/The Daily Mississippian, Thomas Graning)

Buildings are damaged along Gloucester Street after a tornado in Tupelo, Miss., Monday, April 28, 2014.T ornados flattened homes and businesses, flipped trucks over on highways and injured numerous people in Mississippi and Alabama on Monday as a massive, dangerous storm system passed over several states in the South, threatening additional twisters as well as severe thunderstorms, damaging hail and flash floods. (AP Photo/The Daily Mississippian, Thomas Graning)

The remains of the Purvis’ home in Vilonia, Arkansas. (Yahoo News/Jason Sickles)

Hunter Allred attempts to coax out a cat that was underneath a home along Clayton Ave in Tupelo, Miss., Monday, April 28, 2014. Allred was helping the home’s owner who had returned looking for pets after a severe weather system blew through the South. (AP Photo/The Commercial Appeal, Brad Vest)

Photos: Bad Flood Swept Athens

A flash of lighting is seen in Piraeus, near Athens during a rainstorm on Friday, Feb. 22, 2013. Hours of heavy rainfall in Athens caused extensive flooding, inundating basements and forcing authorities to close major roads and a central subway station. The Greek fire brigade says it received more than 900 calls to pump out water in the greater Athens region Friday. (AP Photo/Fosphotos, Elina Liberta)

A bad flood hit Greece’s capital, Athens after heavy rains.

It caused real havoc, crippled traffic and flooded basements and streets. 

The flood waters submerged underpasses and highways in low-lying parts of the city and the racing waters swept parked cars in the areas.

(Please click here for a dramatic rescue of a woman from her car in the racing water in Chalandri, Athens)

AP news reported that, “The overnight storm swept across greater Athens, flooding hundreds of homes, causing blackouts in parts of the city and forcing authorities to close major roads and a central subway station in Athens.”.

There were no reported injuries but it was reported that a 23 year old woman died after being rescued and sent to a hospital. 

This is a disaster.

(Please click the photos for larger images)

A sudden heavy rain storm floods the Greek capital, immersing houses in water and trapping people in cars. Rough Cut (no reporter narration).

A man tries to remove a car from a flooded road at Elliniko near Athens after a rainstorm Friday, Feb. 22, 2013. Hours of heavy rainfall in Athens caused extensive flooding, inundating basements and forcing authorities to close major roads and a central subway station. The Greek fire brigade says it received more than 900 calls to pump out water in the greater Athens region Friday. (AP Photo/Kostas Tsironis

A man tries to remove a car from a flooded underpass at Faliro near Athens after a rainstorm Friday, Feb. 22, 2013. Hours of heavy rainfall in Athens caused extensive flooding, inundating basements and forcing authorities to close major roads and a central subway station. The Greek fire brigade says it received more than 900 calls to pump out water in the greater Athens region Friday. (AP Photo/Kostas Tsironis

People look at damaged cars following heavy rain in Chalandri suburb north of Athens February 22, 2013. REUTERS/John Kolesidis

A woman wades across a flooded highway linking Athens with its port of Piraeus, during a rainstorm on Friday, Feb. 22, 2013. Hours of heavy rainfall in Athens caused extensive flooding, inundating basements and forcing authorities to close major roads and a central subway station.The Greek fire brigade says it received more than 900 calls to pump out water in the greater Athens region Friday. (AP Photo/Petros Giannakouris)

A woman shelters from the rain and the flodding at a bus stop, by standing on a bench, on a flooded highway linking Athens with its port of Piraeus, during a rainstorm on Friday, Feb. 22, 2013. Hours of heavy rainfall in Athens caused extensive flooding, inundating basements and forcing authorities to close major roads and a central subway station. The Greek fire brigade says it received more than 900 calls to pump out water in the greater Athens region Friday. (AP Photo/Petros Giannakouris