It left 695 people dead and more than 2,000 injured, not counting the casualties from at least seven other twisters that the main storm spawned.

The deadliest twister in recorded U.S. history struck 100 years ago Tuesday, touching down in southeastern Missouri and tearing up everything in its 219-mile (352-kilometer) path for nearly four hours through southern Illinois and into Indiana.

Tuesday will mark a somber anniversary, as it will be 100 years since the deadliest tornado in the country’s history hit Illinois.

Millions of Americans across the country are on alert for a severe weather outbreak as violent, long-track tornadoes with damaging winds of up to 80 mph and large hail are expected across the Midwest and South with the cross-country storm moving east.

A powerful storm system sweeping through the central and southern United States has resulted in the deaths of at least 33 people.

Violent tornadoes and high winds decimated homes, wiped out schools and toppled semitractor-trailers as a monster storm that killed at least 32 people ripped its way across the central and southern U.

On Sunday at 12:51 a.m. an updated tornado watch was released by the National Weather Service in effect until 3 a.m. for Barbour, Bullock, Pike and Russell counties.

At 2:12 p.m. on Sunday, the National Weather Service released an updated tornado watch in effect until 4 p.m. for Armstrong, Clarion, Forest, Indiana, Jefferson and Venango counties.

The NWS Raleigh NC issued an updated tornado watch at 11:20 p.m. on Sunday in effect until Monday at 1 a.m. The watch is for Cumberland, Edgecombe, Franklin, Halifax, Harnett, Hoke, Johnston, Nash, Sampson,