Tornadoes whipped through Missouri on Friday night, ripping apart homes, businesses, and the electrical system. Gov. Mike Kehoe’s Office says at least 12 people have been killed and one person is still missing from the severe weather.

The dynamic storm from Friday through Sunday had earned an unusual “high risk” designation from weather forecasters.

In some extreme cases, thunderstorms can spawn a derecho, a long-lived windstorm with gusts over 100 mph, strong enough to cause widespread destruction. If a severe thunderstorm warning mentions damaging winds or a derecho, take cover immediately—just as you would for a tornado.

Several states throughout the Midwest and South reported tornadoes overnight, with widespread damage and multiple fatalities reported in Missouri. KSDK's Megan Kernan and Travis Cummings report on the latest damage.

President Donald Trump has activated the National Guard in tornado-struck Arkansas after storms ripped through multiple states over the weekend, leaving at least 37 dead.

Multiple people have died amid an outbreak of severe weather across the South that forecasters warn could include "violent" tornadoes, high winds, thunderstorms and flash flooding on Saturday. Two people died and others were injured in a suspected tornado that touched down in the Bakersfield area of southern Missouri,