World. Nightly news from rio begins right now. Announcer this is nbc nightly news with lester holt reporting tonight from the olympic summer games in rio. Good evening from copacabana beach. Now one week into the rio olympic games, several big headlines from here that we will of course get to. But we start back home in the deep south where many areas are under states of emergency tonight. Record flooding is mississippi, leaving communities cut off, pressing rescuers into action and plunging many into the dark and it comes as other parts of the country suffer in devastating heat. Nbcs Gabe Gutierrez is watching it all for us tonight. Reporter tonight much of louisiana is under water. This is my neighborhood right now. Water everywhere. In the houses. Parish, dozens of stranded residents rescued after being trapped in their homes by the rising water, in some areas, more than a foot of rain fell in 24 hours, this School Bus Stuck in floodwaters, no children injured. In east baton rouge, a 68yearold man was kill when he fell into a ditch. Several swollen rivers now at our near record levels in a region just recovering from record rainfalls in march. Louisiana hasnt received this kind of were going to do it twice in five months. Reporter the deluge also pounded alabama and mississippi where road closures cut off some towns. All that moisture not only drenching the gulf coast, but also responsible for sweltering humidity in the northeast. More than 70 Million People are under advisories or warnings. With already six t o w e l v e inches having fallen, will lead to some areas picking up possibly more than a foot of rain through monday. Reporter here in louisiana, the National Guard is on the move, thousands are without power and tonight debbie stout is at an emergency shelter. We dont know where were going from here, we have nowhere to go. Reporter she took these pictures of her flooded apartment before she was rushed to safety. Its horrible, and you never think it can it took my home. The home i wanted to live in until the day i die. Its gone. Reporter here, many homes and businesses are islands. Overnight there will be a curfew, flood watches are in effect through tomorrow. Lester . All right, gabe, thank you. And tonight here in rio, team usa continues to lead the world in the medal count with dominating performances in swimming and womens gymnastics. Michael phelps is swimming for gold again, all in the wake of the death of a military Police Officer thats also making headlines. Nbcs Miguel Almaguer from where opening and closing ceremonies are held, police swarm a favela where a member of the olympic Security Force was killed, the officers convoy ambushed, sprayed with gun fire, after a wrong turn into the slums. At Olympic Parks controlled explosions of abandoned bags, but no serious security threats. Today at the games, a soccer stunner, team usa the defending champs out in a shootout. He Kayla Harrison in judo, rio is golden. Using her life struggles as fuel to a consecutive win. Theres been a lot of moments where i doubted myself and i almost quit and im glad i didnt quit because it was the best day of my life. Reporter fresh off her win, simone biles is the best of her generation, but tonight many say she may be the greatest of all time. This has been her destiny all along. Reporter in the 100 meter free, another simone is just when you think you have seen it all. Reporter Simone Manuel in a tie for gold, but standing alone, the first africanamerican woman to be the best in the pool. I just got a gold medal and im just so blessed. Reporter for Michael Phelps, another golden race, the rivalry with ryan lochte, the 200 i. M. Was close, but may not be over. Michael phelps has i think hes going to miss it again and i think hell come back. Reporter Michael Phelps and Katie Ledecky both swim for gold. Meantime after that loss today, goalkeeper hope solo said the swedes played like cowards and they deserved to lose. Thats not going over well here, lester . And fresh off their first and second place finishes in the all around, i had a chance to sit down with american with simone biles and aly raisman. For aly, it was a chance to win the gold medal she lost in london in a tie breaker. And simone biles winning her first gold. I began by asking what it was like to be her at that moment. Whats it like to be me . Right now it feels like im going to cry every minute. But i remember im an ugly crier, so i cant do that. You did get emotional. And we havent seen lot. Yes. What about that moment brought the tears . Its something youve dreamed of for so long and it finally happens and it hits you and you have a rush of emotion that you cant even control. And aly, everybody likes a good redemption story, how was it for you . Its been a hard road, but me and simone kept saying, were going to go onetwo. Watching the two of you genuinely supporting each other, what was going on down in the way we competed, and to share that moment together, its amazing. And youre competing against each other, youre also rooting for each other. Whats that like . Its nice because obviously everyone knew that simone was going to win. We went onetwo the first day, so that was the goal. I feel like it was actually a little bit less pressure for me. When you just said everyone knew simone was going to win. Yes. That has been the story line since we all got here. I still have trouble understanding how someone deals with that kind of pressure and expectations . Yeah, we dont get it either. Im not someone that just brushes it off. Theres always something that could happen or go wrong so i never take anything for granted because who knows . A lot of young girls were sitting in front of tvs watching you. What do you want to say to them . Be where you are . I say that i love them all with all my heart and i was one of those girls watching 2012 so i know exactly what its like so to share the podium with aly, its like amazing, it can happen. That was a pretty neat moment. Starting sunday, simone biles has a chance to earn three more individual medals here in rio. To president ial until the election, and Hillary Clinton is turning up the heat releasing her tax returns, trying to pressure donald trump to release his, after trump calling the president the founder of isis with sarcasm. We have it all with nbcs kristen welker. Reporter tonight, Hillary Clinton hoping the release of her 2015 tax returns will pressure donald trump to do the same. Because he refuses to do what every other president ial candidate in decades has done and release his tax reporter the filings show the clintons made a combined 10. 7 million last year, far less than the 28 million they made the year before, they donated just over 1 million to charity, virtually all of it to the Clinton Foundation and more than half of the clintons income from paid speeches, some of the same speeches she came under fire for during the primaries for not releasing the transcripts. When everybody does it, okay, i will do it. Reporter but the Clinton Campaign hopes todays release will cast a cloud over trumps campaign. 64 of americans saying trump should release his taxes, clinton supporter Warren Buffett even daring him. Ill bring my tax return and he can bring his tax return. Reporter but tonight fresh fears for the Clinton Campaign. Intelligence Officials Say a russian cyber attack on the Democratic Party is a threat more real. With the amount of information the adversaries have access to, theyre likely to start information into the Public Domain on a regular basis. Reporter the possibility looming of an october or possibly a september surprise. Reporter im Halle Jackson in pennsylvania, where less than 48 hours after he accused president obama of founding isis, even donald trump cant decide whether he meant it. Obviously im being sarcastic. Then, but not that sarcastic to be honest with you. Reporter the surprising sort of walk back followed the day when trump did more than double down. I meant exactly that, hes the founder of isis. I know what you went, you meant that he created the vacuum and he lost the peace. No, i meant that hes the founder of isis. Reporter now saying that the media misrepresenting him. Remember when he said that the russians should hack the clintons . Of course im being sarcastic. To trump, its real daring clinton to go after republican vulnerabilities with isis still launching deadly attacks. Theyre expanding. Reporter today to reassure republicans and help keep the candidate on message, a Rare Campaign cameo from party head reince priebus. In spite of the media, this man is going to win. Reporter not if these numbers win, maris polling out tonight shows clinton leading trump in four key swing states. Without the comeback in his battleground states, the path isnt narrow, its nonexistent. Back overseas now, theres word of a horrific attack in the war in syria, where theres claims chemical weapons apparently used against children, many of them small babies. We have to warn you that some of the images are disturbing. Nbcs bill neely has details. Reporter one of dozens of children who doctors say breathed in chlorine gas, this oxygen. Umped pumped oxygen. Chlorine makes lungs fill with liquid, using it is a war crime. You dont have to be a doctor to know this is not right. Reporter this was minutes after the attack which rebels say the regime launched. A stream of victims. The u. N. Says theres a lot of evidence this was a chemical attack. A red line for us. Reporter president obama threatened to retaliate for Chemical Attacks four years ago, he didnt. Doctors in aleppo now writing him an angry letter, we dont need tears or sympathy or even prayers, they say, we need your action. Aleppos children and heroes are dying. The rescuer who famously pulled this baby out alive from the rubble two years ago, was found dead yesterday after an air strike. The air is filled with the sound of furious fight for aleppo, and its claimed filled too with chemical gas, bill neely, nbc news. There is a lot more ahead as we continue tonight, well have much more from here in rio, including the other side of Michael Phelps. Also the flight theyll never forget, Dozens Injured when a plane hits severe copacabana beach. Whats old is new again when Michael Phelps is in the water. His short retirement served him pretty well during his rio come back where he has earned four more gold medals. Since his last appearance in london, his family has extended with his new baby and his mother joining him in the stands. I got a chance to talk to the family about michaels present and future. I have to ask you, was there anybody happier to hear he was coming out of retirement and i did the supporting. Were you the one pushing him in the direction of rio . No, no, no, no come on, lester. I wasnt pushing him. I said i have never been to rio, that would be nice. He said ill send you on vacation. I stayed okay, thats good. Nicole, you guys met in 2007. Correct. Did you imagine that he might be competing in the 16 olympics . No, and i never imagined that we would have a kid at this married. And all the fun that we have gone through. One of the first things my wife and i learned as parents, never wake a sleeping baby. So youre there in the stands and Little Boomer is wearing earmuffs. Whats it like to contain yourself and keep him under control . Its difficult but hes a breeze. He deals with me when im crazy and jumping up and down and then he goes back to sleep. What about the boomers instagram account. Okay my god. Its become an always sleeping so when does he have time to post . He tells me, i need to do a post. Prop him up on the pillows and he tell s me what to say and then were good to go. Are you in awe of him . I have to say, he absolutely amazes me in the comebacks that he has had. And last night in that race being ahead by so far, is so amazing. One of the things about our society is everybody does well and everybody says away. Would either of you like to see him race in tokyo . I think well just go, can we start with that . Go on vacation . Were going to go and were going do race . I just dont know if he can just stop. Nicole, would you like to see him race in tokyo . I have to tread likely on this one. Because whatever i say, hell be like you said this, this is whats happening so we have to be careful. It would be incredible to see, might be even better to see 2024, but that puts him to be a little bit older than would be likely. So well see what he does. Entire interview. Nicole johnson says she and michael have set a wedding date and soon was about as specific as she would go and of course we wish them well and much happiness. When we come back, a stunning reversal of fortune for the man in the center of the Series Making a murderer. Back in the u. S. , a harrowing experience last night for 151 encountered severe turbulence. Two dozen were injured. Blake mccoy now with details. Reporter this is the aftermath of what passengers describe as a terrifying ride in stormy skies. It was pure terror. We just dropped like that. Reporter jetblue flight 429 experiencing turbulence when passengers Say Something caused the plane to suddenly and violently drop. I was using my computer and it flew up into the air. Overhead luggage would come down and the lady next to me started flying. Reporter the force so violent, it ripped the toilet off the lavatory floor. The flight that had been navigating through storms from boston to sacramento diverted to rapid city, south dakota. Emergency responders waiting on the ground. They have numerous injuries on the flight due to turbulence. Before landing, calls for a doctor at the back of the plane. Flight attendants were standing obviously and theyre the ones that took the the force was enough to cause a fairly significant dent in one of the ceiling tiles. Reporter two flight attendants and 22 passengers treated at the hospital. Other examples of violent turbulence this year including this flight to indonesia in may, 31 people were injured. Tonight jetblue is apologizing for a flight passengers would rather forget. Blake mccoy, nbc news, chicago. A major reversal of fortune tonight and a stunner for the tens of millions who watch smash hit Series Making a murderer. One of the men convicted may soon be set free after a judge ruled his confession was coerced. Brendan dassey was 6 when he was accused of helping another man rape and murder a woman in wisconsin. Dassey confessed with words that were fed to him, taking advantage of his low iq. Today a federal judge agreed. Prosecutors have 90 days to appeal. Man. Were back with more moments we have witnessed here in rio this past week, perhaps none carries more significance than what happened in the pool last night. When a Young American named Simone Manuel broke a record and broke a barrier. Heres ron mott. Shes coming back a little bit and look at Simone Manuel. Reporter as with any first, there are lasting impressions. Its a tie for the gold. Reporter Simone Manuels historic 100 meter gold medal swim was something to behold, not just as an a cultural break through. I cant begin to tell you what this means for the sport of swimming in the united states. Reporter one the 20yearold Stanford University student had only dreamed. Reporter simone, last night the look on your face was priceless. Describe the expression . I was just super excited. Winning a gold medal was not something i expected in this meet. In the best way i know. Reporter she grew up in houston, but she was the first africanamerican woman to become a gold medal olympic champion. She was definitely a natural. Im telling everybody, i was her first swim teacher. Reporter her race to glory is part challenging of stereotypes. I would like there to be a day where there are more of us and its not simone the black swimmer. Its historic and in this venue, its just great. Reporter tonight simones mother sharon, flush with pride. D with pride. She has shown us from a very young age when she sets her mind to doing something, shes going to give it her all. So for me, i thought anything was possible, honestly. Reporter in the emotion of last night, simone shared. This medal is not just for me, its for all the people after me who believe they cant do it. I want to swim just like that, but i know that i have to practice, practice to. Right now on 12 new 6 00. 12 news is in rio. Three things you need to know about before jumping back into your favorite sport. The cardinals about to play their first preseason game of the year and we are live. Recreational pot problems. And the 30 most fun plays to live are are any valley cities on the list . And good evening, everyone. Thanks for joining us on 12 news gold to their collection tonight. Some of the biggest names in swimming are back in action, a look ahead to tonights ents is coming up. But first vanessa is live in rio with a preview. Reporter hey, guys, coming to you from rio once again. In just a few minutes, well be talking to the first africanamerican female swimtory win a gold medal in an individual competition. You wont want to miss what she said she did not mince any few minutes. All right. Now to our big story, just a day after making it on the ballot, arizona Recreational Marijuana initiative is in jeopardy. A judge hearing arguments today on whether voters will get a chance to decide the issue, but time is running out. Brahm is here what it means. Reporter it means a spot isnt guaranteed