Fox News Weather Center

LIVE: Destructive Tornados Wreak Havoc Across Plains

After Saturday's violent thunderstorms, severe weather is threatening lives, property and Mother's Day festivities across the Plains on Sunday.

The strongest thunderstorms on this Mother's Day are bringing damaging winds, large hail, frequent lightning and blinding downpours. Several tornadoes have already touched down and caused damage in Texas and South Dakota.

Significant damage has been reported in the town of Delmont, South Dakota after a tornado struck the area Sunday morning. An estimated 20 homes have been damaged and South Dakota Gov. Dennis Daugaard said residents are being asked to leave the city for safety reasons as the town is without water and electricity. Personnel from the South Dakota Highway Patrol and Office of Emergency Management are helping to asses damage and deliver resources. Nine people were injured in the tornado, according to the Associated Press.

In Texas, tornado damage has been reported in the town of Denton about 40 miles to the northwest of Dallas. Significant flooding has also been reported in Denton County and Johnson County, Texas.

UPDATES: (All times are listed in CDT)

9:30 p.m. CDT:

9:21 p.m. CDT: Granbury City Council issued a disaster declaration and emergency order due to storm-related damage. The city of Granbury is located southwest of Dallas.

8:40 p.m. CDT: A look at the damage to the high school in Lake City, Iowa.

(Photo/Twitter user @Lehighs_Finest)

8:19 p.m. CDT: A photo of the destructive tornado near Lake City, Iowa, from around 7:23 p.m. CDT.

7:58 p.m. CDT: An NWS trained spotter reports a high school roof was ripped off its building and trees and power lines are down in Lake City, Iowa after a confirmed tornado barreled through the area. Multiple roofs are off houses and the damage is estimated to be two blocks wide.

7:24 p.m. CDT: In this video from extreme meteorologist Reed Timmer, a wedge tornado is shown forming just south of Brandon, Texas.

7:11 p.m. CDT: An NWS trained spotter reported a funnel cloud 7 miles southeast of Canova, South Dakota. The funnel cloud came about halfway down to the ground before going back into the cloud.

7 p.m. CDT: The National Weather Service in Sioux Falls, South Dakota, has rated today's tornado in Delmont as an EF-2.

Click here for more reports from earlier on Sunday.