Tornados are wreaking havoc in cities in the middle of the US with deaths and damage reported.

The four confirmed deaths in Oklahoma were in Canadian County, west of Oklahoma City,  with 60 injuries reported and 58,000 were without power.

In Kansas, two people died near the town of St. John, state emergency management spokeswoman Sharon Watson said.

Meanwhile, Tornados and golf-ball sized hail ripped into the Dallas Metro area late Tuesday night, with reports of widespread damage and downed trees.

Tornado's moved Eastward from North Texas counties after touching down in in the eastern town of Azle and also extensive damage in Saginaw.

Initial reports are coming in from Skywarn spotters of 10 inch diameter trees down in the Dallas area and structural damage on the north side of the city.

Lightning prompted evacuation of the upper deck of Rangers Ballpark in Arlington during Tuesday night's Texas Rangers-Chicago White Sox game. The game went into a rain delay in the fourth inning.

The twister follows one that that just reeked havoc on the small town of Joplin Missouri, killing 117 people -- one of the deadliest on record.

More deaths have resulted from outbreaks of multiple tornadoes.

On April 27, a pack of twisters roared across six Southern states, killing 314 people, more than two-thirds of them in Alabama.

Speaking from London, President Barack Obama said he would travel to Missouri on Sunday to meet with people whose lives have been turned upside down by the twister.

The American people are by your side, Obama said. We're going to stay there until every home is repaired, until every neighborhood is rebuilt, until every business is back on its feet.

The National Weather Service has issued a tornado watch for Collin, Cooke, Dallas, Denton, Grayson, Jack, Montague, Palo Pinto, Parker, Rockwall, Tarrant and Wise counties until 10 p.m.