stadium. back to you guys. up next on nightly news, severe flooding leads to a state of emergency in louisiana. developing news tonight. deadly flood disaster on the gulf coast. state of emergency declared in louisiana. heavy rain and heroic rescues as rivers overflow their banks up to and donald trump says he was being sarcastic after calling president obama the founder of isis and hillary clinton releases her tax returns, trying to get trump to release his. and the thrill of victory, michael phelps makes history again. we talk to his family. and there's something about simone, we're with

simone who shocked the 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 emergency tonight. record flooding is ravaging parts of louisiana and 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. 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.

>> reporter: 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 68-year-old 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 received this kind of rain in 500 years and we're 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 cutting off the gulf coast, but also sweltering heat in the northeast, more than 7 million people under advisories or

flooding. >> reporter: here in louisiana, the national guard is on the move, thousands are without power and tonight debbie south is at an emergency shelter. >> we don't know where we're going from here, we have nowhere to go. >> reporter: she took these pictures of her flooded apartment before she was rushed to safety. >> it's horrible, and you never think it can happen to you but it does. it's my home, the home i wanted to live in until the day i die is many homes and businesses are islands, many areas are under curfew, flood watches through tomorrow. and tonight here in rio, team usa continues to lead the world in the medal count with dominating performances in swimming and women's gymnastics. michael phelps is

>> reporter: six miles from where opening and closing ceremonies are held, police swarm a favella where a member of the olympic security force was killed, the officer's convoy ambushed, sprayed with gun fire, after a wrong turn. at olympic park, no security threats. today at the games, a soccer stunner, team usa the defending champs out in a >> the united states are out. >> reporter: but for kayla harrison in judo, rio is golden. >> there's been a lot of times when i doubted myself and i almost quit and i'm glad i didn't quit because it was the best day of my life. >> reporter: simone biles is the best of her generation, but tonight many say she may be the greatest of all time.

another simone is making history. >> just when you think you have seen it all. >> reporter: simone manuel in a tie for gold, but standing alone, the first african-american woman to be the best in the pool. >> i just got a gold medal and i'm just so blessed. >> reporter: for michael phelps, another golden race, the rivalry with ryan lochte, the two im, over. >> michael phelps has done it again. >> i think he's going to miss it again and i think he'll come back. >> reporter: michael phelps and katie ledecky both swim for gold. but the goalkeeper said that the swedes played like cowards and they deserved to lose, and that's not going over well here. and fresh off their first and second place finishes in the all around, i had a

gymnastics sensations with simone biles and aly raisman. winning the gold medal she lost in london. i began by asking what it was like to be her at that moment. >> what's it like to be me? right now it feels like i'm going to cry every minute. but i remember i'm an ugly crier, so i can't do that. >> we have seen you get emotional and we >> yes. >> what about that moment brought the tears? >> it's something you've dreamed of for so long and you have a rush of emotion you can't control. >> aly, this is a redemption story for you? >> it's been a hard road, but me and simone kept saying, we're going to go one-two. >> watching the two of you genuinely supporting each other,

>> i think we were so happy to go out there and share that moment together, it's amazing. >> and you're competing against each other, you're also rooting for each other. >> it's nice because obviously everyone knew that simone was going to win. we went one-two 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 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 didn't get it either. >> you can't just brush it off. 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

>> 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 it's like so to share the podium with aly, it's 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 presidential ti 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 was sarcasm. we have it all with nbc's 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

returns. >> 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 speeches, the same speeches she came under fire for in the primary when she didn't release the transcripts. it. >> reporter: 54% of americans saying trump should release his taxes, clinton supporter warren buffett even daring him. >> i'll bring my tax return and he can bring his tax return. >> reporter: but tonight fresh fears for the clinton campaign. a russian cyber attack on the democratic

information the adversaries have access to, they're likely to start dropping that information into the public domain on a regular basis. >> reporter: prompting maybe an october or a september surprise. >> reporter: i'm halle jackson in pennsylvania, where less than 48 hours after he accused president obama of founding isis, even donald trump can't decide whether he meant it. >> obviously i'm being sarcastic. then, but not that sarc with you. >> reporter: the surprising sort of walk back followed the day when trump did more than double down. >> he's the founder of isis. >> i know what you meant, you meant he created the vacuum. >> reporter: no, i meant that he's the founder of isis. >> reporter: remember when he said that the russians should hack the clintons? to trump, it's real

republicans, it's real frustrating. with isis still launching deadly attacks. >> there are now 28 countries. >> reporter: today to reassure republicans and help keep the candidate on message, a rare cameo from reince priebus. >> in spite of the media, this man is going to win. >> reporter: not if these numbers win, maris polling out tonight shows trump losing to >> without the come back in his battleground states, the path to winning is nonexistent. chemical weapons apparently used against children many of them small babies. bill neely has details. . >> reporter: one of

in chlorine gas, this baby is kept alive only by hand dumped oxygen. chlorine makes lungs fill with liquid, using it is a war crime. this was minutes after the attack which rebels say the regime launched. a stream of victims. the u.n. says there's a lot of evidence this was a chemical attack. >> a red line for us. >> reporter: president obama threatened to retaliate for chemical ago, he didn't. doctors in aleppo now writing him an angry letter, we don't need tears or sympathy or even prayers, they said, we meet your action, aleppo's 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

too with chemical gas, designed to choke its children. bill neely, nbc news. there is a lot more ahead as we continue tonight, we'll have much more from here in rio, including the other side of michael phelps. also the flight they'll never forget, dozens injured when a at safelite, we know how busy life can be. these kids were headed to their first dance recital... ...when their windshield got cracked... ...but they couldn't miss the show. so dad went to the new safelite-dot-com. ook the stage. safelite-dot-com is the fast, easy way to schedule service anywhere in america! so you don't have to miss a thing. y'all did wonderful! that's another safelite advantage. (girls sing) safelite repair, safelite replace. i had so many thoughts once i left the hospital after a dvt blood clot. what about my wife... ...what we're building together... ...and could this happen again?

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again when michael phelps is in the water. his short retirement served him pretty well during his rio come back where he has won four gold medals. his cheering section has now extended when his newborn baby and his mother joins him in the stand. i got a chance to talk to the family about michael's present a you heard that michael was coming out of retirement and going to rio? >> i did the supporting. >> were you the one pushing him in the direction of rio? >> i wasn't pushing him. i said i have never been to rio, it would be nice. he said i'll send you on vacation. i stayed okay, that's good. >> in 2007, did you

>> no, and i never imagined that we would have a kid at this point and be getting married. >> the thing i learned in my life is never wake a sleeping baby. what is it like to contain yourself and keep him under control? >> he's a breeze, he deals with me when i'm crazy and jumping up and down and then he goes back to sleep. >> what about the boomer account. >> i need to do a pose and i prop him up on the pillows and he tells me what to say and we're good to go. >> are you in awe of him? >> i have to say, he absolutely amazes me in the come backs that he has had. and last night in that race. >> when everyone says

either of you like to see him race? >> i think we'll just go, can we start with that? >> go on vacation? >> we're going to go and we're going do race? >> i just don't know if he can just stop. >> would you like to see him race in tokyo? >> i have to tread likely on this one. because whatever i say, he'll be like you said this, this is what's happening so we have to be careful. it would be but that would put a little older. >> 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

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country jetblue flight when the plane encountered severe turbulence. two dozen were injured. blake mccoy now with details. >> reporter: this is the after math of what passengers describe as a terrifying ride in stormy skies. >> it was pure terror. >> reporter: jetblue flight 429 experiencing turbulence when passengers say something caused the plane to suddenly and computer and it bounced up into the air. >> we started to come down. >> reporter: the force so violent, it ripped the toilet off the lavatory floor. the storms causing the flight to be diverted. before landing, calls for a doctor at the back of the plane. >> flight attendants

the ones that took the brunt of the injury. 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 in flight, this flight where 32 were injured. blake mccoy, nbc news, chicago. a major reversal of fortune tonight of millions who watch the netflix true crime series "making a murder" one of the men convicted maybe be set free after judges ruled a confession was coerced. he was 15 when he helped another man rape and murder a woman. taking advantage of his low iq. today a federal judge agreed.

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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. here's ron mott. >> she's coming back a little bit and look at simone manuel. >> reporter: as with any first, there are lasting impressions. >> it's a tie for the gold. >> reporter: simone manuel's tie for the 100 meter gold medal behold, not just as an olympic record, but as a cultural break through. >> i can't begin to tell you what this means for the sport of swimming in the united states. >> reporter: one the 20-year-old stanford university student had only dreamed. the.

in the best way i know how. >> reporter: the first african-american woman to become a gold medal olympic champion. >> she was definitely a natural. i'm 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 it's not simone the black swimmer. >> it's historic and in this venue, it's just ea simone's mother, flush with pride. >> she has shown us from a very young age when she sets her mind to doing something, she's 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, it's for all the people after me who believe they can't do it. >> i want to swim just like that, but i know that i have to practice, practice to

>> reporter: a life lesson taught and learned in 52.7 seconds. ron mott, nbc news, rio. and that's going to do it for us on a friday night, reminding you nbc

lights. access. rio. did you ever think there was a time you guys wouldn't make it together? >> oh, yeah. yeah. >> now we have a little one and a wedding at the end of this year. >> the three loves of michael's live. mama phelps, fiance nicole, and little so much about where they've been and where they're going. >> it will be small and intimate for the wedding. then we're throwing a -- >> are you sure you're not with simone? congratulations. >> simone biles' proud sister and brother. wait till you see the final five's heartfelt thank you to or team captain. where are you taking me, natalie, where are we going? >> blame it on rio. a lesson in how to celebrate like the locals. >> oh my gosh, i don't know if i