At least 18 people are dead after severe weather hit parts of Missouri, Texas and Arkansas overnight, officials said.

Eleven storm-related fatalities were reported in the Missouri counties of Ozark, Butler, Wayne and Jefferson, the state highway patrol said. Three people were confirmed dead in Independence County, Arkansas, the state?s emergency management division said.

Four were reported dead in Texas, officials said Saturday.

At least 29 people were injured in eight Arkansas counties, state emergency officials said.

Additionally, almost 300,000 customers are without power across five states ? Missouri, Illinois, Indiana, Texas and Arkansas, according to Poweroutage.us.

Millions of Americans across the country are on alert for severe weather with tornado watches in effect for eight states: Louisiana, Arkansas, Mississippi, Alabama, Tennessee, Kentucky, Indiana and Ohio.

A new particularly dangerous situation tornado watch was issued Saturday across much of Mississippi, as well as portions of eastern Louisiana until 6 p.m. CT this evening. This includes cities such as Jackson, Tupelo, Meridian, Mississippi; and Baton Rouge, Louisiana.

?A tornado outbreak appears imminent with the potential for multiple, intense to violent long-track tornadoes from mid-day through this evening,? according to the National Weather Service.

Another tornado watch remains in effect for portions southern Arkansas and northern Louisiana until 1 p.m. CT this afternoon. A line of severe storms is sweeping east across the region bringing the threat of strong tornadoes, damaging wind gusts, and large hail.

Any stronger, slow-moving storms bringing torrential rain could also trigger areas of dangerous flash flooding in the coming hours.

Emergency management was working through the damage Saturday morning, but Robert Myers with the Butler County Emergency Management Agency said daylight would give them a better idea of the amount of destruction.

The Black River Coliseum has been opened as shelter and Myers said that there are people with injuries in nearby hospitals but did not have an exact number.

There were 23 reported tornadoes overnight across four states ? Missouri, Arkansas, Illinois and Mississippi as the severe weather outbreak continues into Saturday. Winds gusted up more than 80 mph causing damage in the Midwest from Missouri to Wisconsin.

The Storm Prediction Center said that numerous significant tornadoes, some of which could be long-track and potentially violent, are expected and cities in the high risk areas include Hattiesburg, Jackson, Tuscaloosa and Birmingham.

The most dangerous tornado threat should begin Saturday during the late morning to early afternoon hours in Louisiana and Mississippi before spreading into Alabama late afternoon into the evening, followed by the western Florida panhandle and into western Georgia through late Saturday night.

Georgia Gov. Brian Kemp issued a state of emergency effective noon Saturday in preparation for severe weather moving into the state this evening and into the morning.

The severe storms are expected to be weaker on Sunday as the storms reach the East Coast from Florida to the Mid-Atlantic.

Damaging winds, large hail and brief tornadoes on Sunday afternoon will be possible for the Southeast, while heavy rain and damaging wind threat will reach the Northeast Sunday evening into the overnight.

The severe weather outbreak is all part of a major cross-country storm system that is also prompting fire danger and red flag warnings across the Plains. (6ABC: Text, Excluding Headline)

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