At least 14 people have died in the US as an ice storm sweeps several states just east of the Rocky Mountains.
An ice storm sweeping the central United States has left at least 15 people dead amid warnings of more freezing weather to come.
More than 400,000 people were left without electricity after trees and power lines toppled in the icy blast.
More than 600,000 homes and businesses were left without electricity after icy winds toppled power lines and trees.
The National Weather Service issued ice storm warnings for parts of Missouri, Kansas, Nebraska, Iowa, Illinois and Texas and said more ice was on the way.
Forecasters have issued winter storm warnings for parts of Missouri, Kansas, Nebraska, Iowa, Illinois and Texas.
Ice up to 1in (2.5cm) thick layered parts of Oklahoma and Missouri, where states of emergency have been declared.
Ice up to 1in (2.5cm) thick coated parts of Oklahoma and Missouri, where states of emergency have been declared.
"We expect a lot more [ice], especially with another round of freezing precipitation that will be making its way through this afternoon," said a spokeswoman for Oklahoma's department of emergency.
"The predictions were pretty grim and they're still not good at all," said meteorologist Noelle Runyan.
All night I could hear the sounds of tree limbs breaking and falling to the ground Blake Thornberry, Oklahoma Send us your comments
The worst-hit states so far have been Oklahoma and Missouri, where at least 13 people have died on roads made treacherous by driving sleet and ice.
Twelve people were killed in road accidents in Oklahoma over the weekend, including four who died in an 11-vehicle pile-up on the ice-covered Interstate 40, west of Okemah.
Twelve people were killed in road accidents in Oklahoma over the weekend, including four who died in an 11-vehicle pile-up on the ice-covered Interstate 40, west of Okemah.
A homeless man died of hypothermia in Oklahoma City, and a highway accident claimed another life in Missouri.
A highway accident claimed another life in Missouri, while a homeless man died of hypothermia in Oklahoma City.
News agencies said at least one other person died, but it was not clear where.
The governor of Missouri, Matt Blunt, warned: "We are only just beginning to see the devastation from this series of storms."
The governor of Missouri, Matt Blunt, warned: "We are only just beginning to see the devastation from this series of storms."
Flights were grounded at Tulsa International Airport, while hundreds more flights were cancelled at major air hubs in Chicago, Kansas City, St Louis and Oklahoma City.
Flights were grounded at Tulsa International Airport, while hundreds more flights were cancelled at major air hubs in Chicago, Kansas City, St Louis and Oklahoma City.
Electricity companies in Oklahoma said that some half a million customers were without power after lines snapped under the weight of ice and falling trees.
Are you in the area? Have you been affected by the ice storm? Send us your experiences using the form below.
"This is a big one. We've got a massive situation here and it's probably going to be a week to 10 days before we get power on to everybody," Ed Bettinger, a spokesman for Public Service Company told the Associated Press news agency.
Ice storm arriving as I write this. School is predicted to be closed tomorrow. My daughter is actually upset because she can't afford to miss chemistry and she doesn't want to have a day without differential equations. But I'm tickled pink because it will mean I don't have to go to work. I've made a chocolate biscuit cake, I'll pour a glass of red wine and sit and listen to Radio 4 all day. Hip hip hooray!!!Te Holmes, Prairie Village, Kansas USA
More than 100,000 people in Missouri also lost power, with several thousand others in Illinois and Kansas also suffering blackouts.
I live in a suburb of Tulsa and we just got our power restored about two hours ago. We were without electricity for two days. It looks like a battle zone around here with trees and power lines down all over the place. There is ice coating absolutely everything about and inch thick. Luckily, the temperature is going to stay above freezing for the next few days, allowing the ice to melt. It's awful.Paul Metzger, Owasso, Oklahoma
I live in Iowa right by the Mississippi River and the storm is supposed to be here in just a few minutes. They are predicting up to 1 inch of ice! We are getting all our stuff ready in case of a power outage. The storm is just about 5 miles south of us right now. Brock, Davenport Iowa
It has been raining since morning. We did not have much ice on roads during the day but with evening and increase in rain, ice accumulation is on. Power is fine. Not much traffic as everyone kept home. Wichita State university closed at 5 pm today due to the weather and exams has been postponed. Tomorrow is going to be very bad day but i have exam so i am studying Indra Dahal, Wichita Kansas The US
I'm a university student at the University of Oklahoma. I was studying for finals, but heard they cancelled class today. The power went out at about 3:00am and all night I could hear the sounds of tree limbs breaking and falling to the ground. In the morning I went out to move my car to find that there were many limbs on the ground, and that they were continuing to fall at an incredible rate. It isn't safe to walk underneath trees at the moment, as I have seen them crush metal street signs. Blake Thornberry, Norman, OK USA
The ice storm wasn't too bad in the inner St. Louis metropolitan but knocked power and crippled streets out in the out lying counties. Most of the school districts canceled classes because of slick overpasses and bridges.Shane, St. Louis, Missouri
We are just beginning to see the effects of this new storm after last weekends ice storm. Driving was very hazardous and will only get worse as we go further into the week. We have 5" of snow on the ground and 2" of ice on top of that. I dread to think what rush hour tomorrow will be like. Hopefully the schools will close or open late to let the salt lorrys out.Richard Wing, Geneva, Illinois
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