At least 34 people are dead after a line of severe storms spawned dozens of tornadoes across the Midwest.

Twelve people were reported dead in Missouri, while another eight were killed in Kansas. Four fatalities were reported in Texas, three in Arkansas and one in Oklahoma. Late Saturday, officials confirmed six people died in Mississippi.

There have been over 40 reported tornadoes across eight states ? Alabama, Missouri, Arkansas, Mississippi, Louisiana, Illinois, Indiana and Tennessee ? in the last 24 hours.

Dozens of injuries have also been reported, with 29 in Arkansas alone.

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.

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. (ABC News, but headline rejigged)

Update news