Bill Bunting

At least a dozen people have been injured after a " devastating" tornado hit Little Rock , Arkansas, officials say.

The twister churned through The State 's Capital City on Friday, flipping cars, smashing roofs and toppling trees.

Several blocks have been heavily damaged, according to aerial footage posted by The Weather Channel.

Nearly 90 million people in US 15 states are under threat from an " explosive" storm system.

One of The State 's biggest hospitals, the University of Arkansas for Medical Sciences Medical Center in Little Rock , said it was expecting at least 15-20 patients from the twister.

Hospital spokeswoman Leslie Taylor said it was operating at a mass casualty level.

Arkansas Governor Sarah Huckabee Sanders tweeted that she had declared a state of emergency after " significant damage" in central Arkansas.

Little Rock Mayor Frank Scott Jr tweeted that he had asked The Governor to deploy The State 's National Guard to The City .

He also urged residents to stay off roads as emergency crews respond to " the devastating tornado".

It Comes just One Week after a rare, long-track twister killed 26 people in Mississippi. President Joe Biden visited The State on Friday to pay condolences and promise federal aid.

High Risk severe thunderstorm warnings were in place on Friday for parts of Arkansas, Illinois, Iowa, Missouri and Tennessee, according to The National Oceanic and Atmospheric Administration's Storm Prediction Center.

The Agency warned in a bulletin that some of the projected tornados could track across the ground for long distances.

Bill Bunting , the operations chief for The Storm Prediction Center, tells Bbc News that The Last time there were two separate such high-risk warnings simultaneously was in April 2012.

" At The Moment , things are unfortunately playing out just as we have feared, " He Said after the twister in Little Rock .

" I think The Next couple of hours are unfortunately going to be very active with severe thunderstorms, tornadoes and intense damaging straight-line winds, " he added.

" We believe The Tornadoes will be on par with what we saw last week. The question is will they track? And what structures will be in their path? And that will largely determine the impact. "

The Mississippi tornado last week travelled 59 miles (94km) and lasted about an hour and 10 Minutes - an unusually long period of time for a storm to sustain itself. It damaged about 2,000 homes, officials said.

It is unclear if the severity of The Storm was fuelled by Climate Change , and The Link between tornadoes and warming weather is complex.

The World has already warmed by about 1. 2C since the industrial era began and temperatures will keep rising unless governments around The World make steep cuts to emissions, says the United Nations ' climate panel.

Source of news: bbc.com