Potential careerending injury. Now the person behind it taking back his story. Who is telling the truth . Wipeout. The holidays hottest gift leading to hospital visits and falls and fires all caught on camera. Even professional athletes taking a tumble. Well tell you how you can ride it, maybe, without the risks. And good morning, america. We hope everyone had a fantastic holiday weekend. Look who we have here tonight. World news tonight anchor david muir. No hoverboard accident. You see that guy wipe out in times square, that was me. So i cant wait for these tips youve got. We want to get right to that Severe Weather battering the middle of the country. Youre looking live at dallas, texas, where tornadoes left at least 11 dead there. In missouri, this morning, a state of emergency. Heavy rains leading to dangerous flash flooding. This drone video showing small creeks now spilling over their banks. Leaving everything under water. More than a dozen deaths. 11 states under a winter storm warning. Four states under a tornado threat this morning. This huge system is stretching from new mexico and texas up to ohio its now moving east. Our extreme weather team covering every angle for us. Rob marciano is in st. Louis for us this morning. Good morning, rob. Reporter a massive multifaceted storm for this part of the country. It is a rain and flooding situation with the Missouri River behind me rising along with other creeks and rimps closing down roads and interstates into whats turning out to be a record setting year for rainfall in st. Louis. Overnight, a state of emergency in the heartland, as Severe Weather pounds the region. Historic heavy rains producing flash floods and at least 15 people are dead. After drowning in flood waters. In tennessee, the river surging to the highest its been in 11 years. This is probably the worst flooding that i have ever witnessed. Its very devastating. Reporter a state of emergency declared in missouri after rampant floodwaters engulfed homes. Swept away rvs and shut down major highways. Its the worst i think anybody has seen. Reporter overnight st. Louis sandbaggers preparing for more. Water is just everywhere. Our neighbors are totally under water. Were out here doing the right thing. Reporter across the midwest, tiny neighborhood creeks morphing into dangerous bodies of water. This is normally 12 feet wide, right now its probably every bit of 200 feet wide. Reporter in illinois, this flooded creek claiming the lives of three adults and two children when their car was swept away. It makes us sick to our stomachs and its a sad, sad thing. We wish it wouldnt have happened especially on a holiday weekend. Reporter this flood like 1993. The temperatures are in the upper 30s and low 40s. Bone chilling cold. Flash flood watch are posted for 14 states. Look at the radar. We have got snow to the west and Severe Weather threat to the south and east and conti throughout the day across the florida panhandle. A devastating weekend for storms david. Back to you. All right, rob, watching it all. Rob, thanks. The deadly tornadoes tearing through texas, at least 11 People Killed in the dallas area this weekend. Hundreds of homes and building simply destroyed. Abcs matt gutman is on the scene this morning with much more for us. Reporter good morning, good morning david. These mounds of debris go house after house over a 40 mile area. Christmas ornaments and car parts. Were talking about homes made out of brick and mortar. Overnight, that tornado spewing and blasting through arkansas. This one bulldozing a house in a spew of debris. This, after a string of tornadoes scarred a 40mile swath of texas this weekend. Police saying at least 11 were killed here in texas. Just total disbelief. Everything on the backside of my house was on the front side of my house. Reporter from the air, you can see the path the storm gouged, a football field lane reduced to splinters. With the tornado bearing down, these people ducked into a freezer at chilis. The tornado blowing up transformers. In the pitch black, the lightning illuminating the ef4 tornado. On interstate 30, some motorists had nowhere to hide. Eight people were killed there. In daylight, we drove through those devastated neighborhoods. The scope of the destruction in these neighborhoods is absolutely astounding. It nearly toppled rowletts water tower. 400 homes damaged there. As far as the roof, everything is gone. Reporter she was saved when she and five family members crowded in their bathroom. Very grateful were alive. I spoke to the police chief of rowlett overnight, he said no ones even talking about the cleanup right now. Theyre only talking about digging out, getting rid of the hazards and all of these mounds of debris could take days and rebuilding these communities he said could take years. Amy. This system bringing heavy rain and wind for some, snow for others. Palm trees in texas coated in snow. The flurries and ice are hitting oklahoma. Abcs Clayton Sandell is there now. Reporter good morning, amy, were here and you can see the problem. Power poles around this region have been snapped in two thanks to the high winds overnight and a lot of this heavy ice which you can see coating the power lines here. In fact, about 100,000 customers are without electricity this morning and you can see what its doing to some of the tree branches. Thick heavy ice weighing them down. Its already a nightmare commute here this morning. We have seen accidents all over the place and let me show you this. Part of the reason is this thick coating of ice that is over the highways and roadways. About an inch thick. This entire region has been turned into one big ice rank. Amy. Clayton, thank you very much. We hope the people stay off those roads this holiday week. Incredible how thick that ice is. Severe weather causing headaches for travelers trying to get home now after the holidays. Thousands of flights delays and abcs linzie janis live this morning in laguardia airport. Reporter the weather having a big impact on air travel, already this morning, more than 690 Flights Canceled across the country. Now that comes on top of 1700 cancellations and 6,000 delays on sunday. One of the busiest travel days of Holiday Season. The worsthit airports this morning, chicago ohare, midway. And dallas is still bad after having a third of its flights affected on sunday. The coast getting hit as well. L. A. And San Francisco had a rough day sunday. As did the hubs here in the northeast. Millions of travelers now hoping today will be much smoother in the northeast. Linzie, thanks so much. Youll have so much more on the travel impact tonight on world news. The other news this monday morning, and to chicago now, another Deadly Police shooting in a city already on edge. Two People Killed, including a grandmother. Police saying her death was an accident and abcs alex perez is in chicago. The families of victims demanding answers. And justice from if the Chicago Police department. Why you got with to shoot first and ask questions later . They were killed saturday after police were called to this house for a domestic disturbance. We got two people shot. Shots fired by the police. Just to confirm. Yes, they were. Reporter legrier was reportedly threatening his dad with a bat. Loved ones say 55yearold jones who lives on the ground floor was opening the door for police when she was caught in a spray of police bullets. Upon their arrival, they were confronted by a combative individual. Reporter police say that jones was accidentally killed and extending condolences. She should not have to open the door and be shot down by a police officer. Reporter legriers mother said her 19yearold son had Mental Health issues but was dreaming of a brighter future. He cared about people. Reporter chicago mayor rahm emanuel has been under pressure to make sweeping changes in an inintense chicago since last month. The first step in that journey is my step. And im sorry. Reporter he is now calling for a review of how officers are trained to handle Mental Health cases. The officers involved are off the streets and on desk duty. As a Police Review board investigate this shooting. Amy. Abcs alex perez in chicago. And to the race for the white house. Your voice, your vote. Donald trump taking aim at bill and Hillary Clinton. The republican frontrunner accusing the former president of sexism. Abcs mary bruce has more now from washington. Good morning, mary. Reporter after a few quiet days, the campaign trail is now roaring back into full swing this morning. The first primaries are still five weeks away. Based on his latest mudslinging, it seems donald trump is already looking ahead to a battle with Hillary Clinton. Donald trump ended his christmas ceasefire with a flurry of tweets and this new attack on Hillary Clinton. Shes playing that womans card left and right. And women are more upset about it than anybody else. Including most men. Reporter trump intensifying his war of words with the democratic frontrunner. Targeting her husbands alleged sexual misconduct. And infidelity. Tweeting Hillary Clinton has announced that shes is letting her husband out to campaign. But hes demonstrated a pension for sexism. So inappropriate. I think that donald trump or any candidate on the other side of the aisle would raise bill clinton as somehow a negative to their peril. Reporter but trump told abcs this week hes being backed by a movement. People are angry. They are angry. Im not tapping into the anger and some people are saying im doing that. And im not doing it intentionally. Reporter trump also taking aim at the Republican National committee. Blasting the Virginia State party over the requirement that they say theyre republican. A move he says can scare off first time voters. Trump tweeting straighten out the Republican Party of virginia before it is too late. Stupid rnc. Now, these latest tweets reflect trumps distrust of the gop leadership and raise a big concern for the party that its frontrunner could launch an independent run. He said hell be loyal as long as hes treated fairly. Amy. More now on this with abc political analyst matthew dowd whos in austin, texas, this morning. Good morning to you matthew. Good morning, amy. Obviously going after hillary and bill works for donald trump leading into the primaries, but is this a strategy that will be effective going beyond that . Well, as you said, amy, it works the one person most hated by republicans is Hillary Clinton. So, anything he does against her is helpful to him. To me its like a scrambling quarterback who might have shortterm success. In the end, their needs may go out. And donald trump is going to face some real problems if he wins the gop nomination in the general election. Matt, this goes both ways. Clinton going after trump as well. Any down side for her doing that . It helps her going after donald trump. He is the most hated political figure among democrats. It helps her there in the primaries. In the end just like donald trump i think she creates a problem for the general elections. Where independent voters dont like this back and forth. So each of them, it helps them in the primary but hurts them overall in the general election. Trump has been the dominant figure in the republican race for 2015, looking forward to 2016, who do you think can change that . Well, youre right, amy, he has been the dominant figure hes led ever since hes got into this race. I think the only person who can bring down donald trump is donald trump. It has to be selfinflicting wounds. And up to this point he seems to have shot himself in the foot five or six different time but hasnt slowed down. The only other thing is, if he finishes second in the iowa caucus to ted cruz, we dont know what happens if he loses for the first time. Thats something that we havent seen donald trump face. All right, matt dowd, thank you so much. 2016 will be very interesting. Lets turn to dan harris for the other top stories this morning. Big news out of iraq the military there said its recaptured the city of ramadi from isis fighters. This is a major victory, if true, for the iraqi forces who have been waging a fierce battle in recent days. Theyre now trying to defuse traps and explosives across the city. Ramadi is considered a crucial step toward recapturing mosul. Iraqs second largest city. Back in this country, fires at two muslim houses of worship are being called intentional. The fire bombing of a mosque near sacramento is being investigated as a possible hate crime. And a mosque in houston, a fire there. In los angeles firefighters said they could have this wildfire fully contained by tomorrow. The fire was started by falling power lines. The concern now is rain will trigger mudslides. A man in san diego, fell off a cliff in a scenic overlook, had been distracted by a cell phone. Witnesses say he was trying to take a picture when he walked over the edge. He did not survive. And look at these images the aftermath of a Train Derailment in a remote area of australia. The train was carrying sulfuric acid which could cause severe burns. Heavy rains making it difficult for officials there to access this site. Millions of americans have been suffering at the airports during the holidays. Check out what happened to a Business Traveler named Larry Hendricks at the airport in atlanta. He was the 100 millionth passenger. There was a News Conference with the mayor. They gave him a car and free roundtrip tickets to anywhere in the world. Its like an acid trip. But heres the kicker, all the hoopla forced him to miss his connecting flight. Tough stuff. Hes accepted all the gifts. However, hes now going to sue no, i made that up. Or drive the new car the rest of the way. Or drive the new car. Thanks, dan. Well turn now to that wild boat chase caught on camera. Lasted 20 hours. More than 300 miles. Alleged thieves taking on the coast guard on a nearly day long pursuit before they were caught. Reporter this morning, three suspects in custody after leading authorities on a 20hour boat chase across the gulf of mexico. They werent going to quit. And neither were we. Reporter the wild hunt beginning thursday morning when these men allegedly stole a speedboat in florida, they said the thieves defeating several antitheft devices. The pursuit spanning over 300 miles, trying to ram a sheriffs boat at one point in the chase. Authorities saying the scene was something out of a james bond movie. Luckily enough, we were able to get out of the way right at the last minute. We had to pull our boat out of the way where they were going to come over the top. Reporter the coast guard deploying three aircrafts to chase the men through the open waters. The authorities finally apprehending them early christmas morning. Just 70 miles off the cuban coast. Well go the extra mile, in this case, we had to go an extra 344 miles. Reporter local Authorities Say boat theft is a local concern in the area. Deputies investigating an organized boat theft ring nearby at the time of the incident. For Good Morning America, reena ninan, abc news, new york. All right, reena, thanks so much. Back to meteorologist rob marciano whos in the thick of this. A holiday thats been tough for so many. Reporter certainly a tough holiday for folks in missouri with roads and highways closed and people filling sand bags. Not too far from here winter storm warnlings for the north west corner of the state from oklahoma up to michigan. Warnings posted icing from north of peora to chicago this morning before changing to rain. Mostly snow. I think well see 6 to 12 inches. Some moisture getting into cold air across the northeast. Most of the big stiffs well be okay, away from i95 and you see icing through albany and significant snows for northern parts of new england. Your local forecast 30 seconds away. But first here are your snowy cities brought to you by macys. Good monday morning. I am meteorologist mike nicco with the forecast. You can see the clouds are breaking up. Drizzle is ending. Grab the sunglasses. We will have chilly nights. But a warmer afternoon through the end of the week and the weekend. Today, about 52 to 55 is the spread. We will have frost inland tonight. 30s there. My sevenday forecast shows look ing dry until monday next coming up next here on Good Morning America the bomb shell report putting football hero Peyton Manning on the offensive, defending himself against drug use allegations. Its completely fabricated. Complete trash, garbage. The undercover video behind the accusations. Have you seen these videos the hoverboard fails. One of the seasons hottest gifts. How to keep yourself from ending up in one of the videos. Gifts. But ive managed. E Crohns Disease is tough, except that managing my symptoms was all i was doing. And when i finally told my doctor, he said humira is for adults like me who have tried other medications but still experience the symptoms of moderate to severe Crohns Disease. And that in clinical studies, the majority of patients on humira saw significant symptom relief. 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