Multiple tornadoes struck the Dallas-Fort Worth area in Texas early Tuesday afternoon. CNN and its Texas affiliates are updating developments as they come in.
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[Update 3:51 p.m. ET] Lt. Tim Jones of the Johnson County sheriff's department told CNN that "911 is going off the wall with people calling in with reports of sightings."
He reported multiple tornado touchdowns across the county, including in the city of Cleburne, south of Fort Worth and southwest of Dallas.
A new tornado warning was issued about 2:45 p.m. CT for Arlington, which is between Dallas and Fort Worth.
[Update 3:40 p.m. ET] DFW airport spokesman David Magana told CNN that people in the airport's passenger terminals had been herded away from windows in waiting areas.
"We have all kinds of shelters. We use all the available space we have including stairwells, store rooms and restrooms, that we can use," Magana said. "We're not shy about moving people around."
He advised people to stay away from the airport until all danger had passed.
[Update 3:33 p.m. ET] CNN's Ed Lavandera, who was in Dallas when the tornado struck, said there were several isolated cells of storms throughout the area.
Lavandara said the track of one tornado would have taken it through a heavily populated area near the stadiums of the Dallas Cowboys and Texas Rangers, as well as Six Flags amusement park. If the storm had stayed on the ground there, it would have caused catastrophic devastation, he said.
"We right now are in shelter ourselves,"Â Red Cross spokesperson Anita Foster told CNN. "Some of our teams that are on the southern end of the metroplex have started making plans for how we are going to respond . ... Many people are going to need help."
She said Red Cross workers would fan out across the area "as soon as it's safe, as soon as we can get out of our door."
Foster warned people to heed warning sirens and seek shelter in interior areas of structures.
Dallas-Fort Worth International Airport halted all takeoffs and landings until the storm system ends.
CNN meteoroligist said hailstones 3 inches in diameter were being reported. CNN affiliate CBSDFW showed evening-like darkness amid heavy rain at 2:25 p.m. CT.
[Update 3:13 p.m. ET]Â At 2:05 pm CT (3:05 ET) Tuesday afternoon, trained weather spotters reported a tornado on the ground five miles east of downtown Dallas, Texas. The tornado is moving northeast at 20 mph.
[Update 3:09 p.m. ET] After the tornado passed through, CNN affiliate CBSDFW showed dozens of orange Schneider trucks in various states of damage and disarray.
CNN affiliate WFAA showed severe damage to some homes in Lancaster,Â Texas.
[Update 2:59 p.m. ET] Separate tornadoes in Texas barreled toward the Dallas-Forth Worth area Tuesday, prompting the National Weather Service to issue tornado emergencies.
Video from CNN affiliate WFAA broadcast dramatic footage of the scene, showing truck trailers being lifted and tossed like toys. Ominous clouds filled the skies.
There were no immediate reports of major injuries or damage, but CNN's Chad Myers said the worst may be yet to come.
"Both storms right now are getting bigger. They both have been rotating, and they both have significant possibilities of damage on the ground heading into DFW," he said.
The weather service urged people in the area to move to a bathroom, closet or hallway on the lowest floor of their buildings and take cover.
[Original post 2:51 p.m. ET] An apparent tornado ripped through Dallas County, Texas, Tuesday afternoon.
A news helicopter from Dallas CNN affiliate WFAA followed a funnel cloud churning through a truck terminal, tossing 80-foot metal cargo trailers hundreds of feet in the air.
CNN meteorologist Jacqui Jeras tweeted, "Watching homes being damaged now in Dallas. Large pieces of debris in the air. Lots of power flashes."
Check back frequently for updates as this story continues to develop.
A high school basketball player in Michigan collapsed and died Thursday night after making the winning shot in overtime to cap his team's 20-0 regular season.
An autopsy will be conducted to determine a cause of death for Fennville High School player Wes Leonard, 16, CNN affiliate WOOD-TV reported.
Gadhafi fights back – Forces loyal to Libyan leader Moammar Gadhafi are fighting to hold or regain control of rebellious areas. Two bombs were dropped Thursday on military camps in the eastern Libyan town of Ajdabiya, a tribal leader said. Another bomb was dropped in al-Brega between an oil facility and the airport, but there were no injuries or damage, witnesses said. Al-Brega, which has key oil and natural gas facilities, also was bombed Wednesday.
Across the Middle East and North Africa, CNN's reporters and iReporters are covering protests, many of them inspired by revolts in Tunisia and Egypt that toppled those countries' longtime rulers. Check out our story explaining the roots of the unrest in each country and full coverage of the situation in Libya. Have a story to tell from the scene? Click here to send an iReport.
Developments on unrest in the Middle East and North Africa:
[OMAN, 9:00 a.m. ET, 6:10 a.m. local] At least two protesters were killed and about 10 injured during clashes between protesters and police in the Omani industrial town of Sohar, according to reports from state media and Oman TV editor Asma Rshid. "The police shot them because they burned shops and cars in Sohar," Rshid said. Another source said police fired rubber bullets. A number of police had also reportedly been injured, but CNN has not been able to confirm how many.
[LIBYA, 9 am ET, 4:15 p.m. local] Protests are picking up in Libya's western city of Zawiya with former security forces who said they have switched sides and joined the opposition.
The United Nations Security Council unanimously approved a draft resolution to impose sanctions against Libya amid escalating attacks on anti-government protesters in the north African country.
The resolution draft includes an arms embargo, asset freeze and a travel ban. It also refers Libya to the International Criminal Court.
[TUNISIA, 9:12 p.m. ET, 3:12 a.m. local] Protests in Tunisia turned violent and deadly Saturday, just over six weeks after a popular uprising forced the president out of office, and lit a spark of desire for democratic reform in parts of Africa and the Middle East.
Three people were killed Saturday and nine others injured during mayhem in the capital, Tunis, according to a Interior Ministry statement cited by the state-run news agency, Tunis Afrique Presse (TAP).
More than 100 people were arrested, the ministry said, in the area around Habib Bourguiba Avenue, in the city's center, accused of "acts of destruction and burning."
[LIBYA, 4:58 p.m. ET, 11:58 p.m. local] City councils in areas no longer loyal to Moammar Gadhafi have chosen former Justice Minister Mustafa Abdul Jalil to head an interim government which will represent all of Libya, according to Amal Bogagies, a member of the February 17 Uprising coalition, and a separate Libyan opposition source.
[LIBYA, 4:40 p.m. ET, 11:40 p.m. local] President Barack Obama, in a statement issued Saturday after reports that forces loyal to Libyan leader Moammar Gadhafi had fired on civilians, said "that when a leader's only means of staying in power is to use mass violence against his own people, he has lost the legitimacy to rule and needs to do what is right for his country by leaving now."
The White House statement wasÂ issued after Obama spoke with German Chancellor Angela Merkel.
[BAHRAIN, 9:37 a.m. ET, 5:37 p.m. local] Exiled opposition leader Hassan Mushaima has arrived back in Manama, Bahrain. Mushaima, leader of the Haq Movement, had told followers earlier in the week that he had been detained in Beirut, Lebanon.
[YEMEN, 2 a.m. ET, 10 a.m. local] Four people were killed and 26 wounded in clashes Friday night between anti-government protesters and security forces in southern Yemen, medical officials in Aden said Saturday.
[LIBYA, 2 a.m. ET, 9 a.m. local] A U.N. security panel is scheduled to meet Saturday to discuss new sanctions against Libya amid escalating attacks on anti-government protesters in the north African country. The resolution draft includes an arms embargo, asset freeze and a travel ban. It also refers Libya to the International Criminal Court.
Funeral for Tucson girl – A memorial service will be held Thursday for Christina Green, 9, the youngest victim of the Arizona mass shooting.
Christina was born on September 11, 2001. For her service, two firetrucks will raise their ladders and connect a U.S. flag nearly destroyed in the 2001 terror attacks in New York. The flag will form an archlike design, which the girl's family will walk under before entering the church.
Christina will be buried in a custom-made casket donated by Trappist monks from a monastery in Iowa.
Arizona shooting – President Barack Obama and first lady Michelle Obama will travel Wednesday to Tucson, Arizona, and take part in a memorial service for the six people killed by a gunman at a public meeting hosted by Rep. Gabrielle Giffords, who was severely wounded. The president is expected to speak at the service.
The U.S. House of Representatives will consider a resolution that honors Giffords, who remains in intensive care. The resolution also reaffirms the First Amendment rights of assembly and petition as "bedrock principles" of American democracy. It recognizes the other victims of the shooting andÂ applauds those who subdued the gunman and assisted the victims.
Elizabeth Smart trial
The jury will resume deliberations Friday morning in the trial of Brian David Mitchell, above at left, a homeless street preacher accused of kidnapping 14-year-old Elizabeth Smart in 2002.
After three hours of deliberation Thursday night, the Salt Lake City, Utah, jury will return at 10:30 a.m. ET Friday.
The jurors will decide whether Mitchell, 57, was legally insane when he snatched Smart atÂ knifepoint from her bedroom on June 5, 2002. Smart testified at the monthlong trial that he led her to a makeshift camp in the canyons above her home, "sealed" her as his spiritual plural wife and raped her.
Veterans Day – America honors its veterans Thursday. Vice President Joe Biden and Defense Secretary Robert Gates will take part in a wreath-laying ceremony at Arlington National Cemetery at 11 a.m. ET.
Be sure to visit CNN.com's Veterans in Focus section for stories, images, video and interactive graphics on:
– a World War II vet's memories of D-Day and how he's training a new generation of warriors;
– how military veterans, the Pentagon and mental health professionals are coming to grips with post-traumatic stress disorder;
– how special courts seek to keep veterans out of prison;
– what might happen next with "don't ask, don't tell"; and
– why a Medal of Honor recipient from the Afghanistan conflict feels angry about the award.
Alaska ballot count – Alaska election officials will begin counting write-in ballots Wednesday despite a federal court challenge by the campaign of Republican U.S. Senate candidate Joe Miller, state director Gail Fenumiai said.
Miller is believed to be locked in a tight race with incumbent Sen. Lisa Murkowski, who ran as a write-in candidate. In last week's election, Miller received 34 percent of the vote, Democrat Scott McAdams, who conceded, collected 24 percent, and 41 percent of ballots were for write-in candidates.
The complaint filed in federal court Tuesday asks Fenumiai's office to "adhere" to state law in the counting of write-in ballots, limiting what the suit called "subjective" voter intent rules that were issued this week. The suit requests a court hearing Wednesday over the rules and asks for an injunction.
Bush memoir release
After staying largely mum on the political scene since leaving office almost two years ago, President George W. Bush will reveal his thoughts on the most historic - and controversial - parts of his presidency with the release of his memoir Tuesday.
In the 481-page book, Decision Points, Bush shares his thoughts on the 9/11 attacks, Hurricane Katrina and what he calls the "worst moment" of his presidency.
The 43rd president also takes responsibility for giving the go-ahead for waterboarding terror suspects, which has touched off a new round of criticism of Bush and calls for his prosecution. He says that he decided not to use two more extreme interrogation methods, but he does not disclose what those were.