welcome to "world news tonight." breaking news right now. a massive rescue operation under way. historic flooding destroying entire towns. more than 7,000 people pulled to safety, including this incredible underwater rescue. and tonight, many still stranded. robbed at gunpoint. gold medalist ryan locthe, in a dangerous stickup near the olympic village. >> he packed it, put it to my forehead, said get down. >> rio's darker side revealed. the real danger at the games. boiling point. an american city erupts in violence after police shoot a black man they say was armed. tonight the governor calling in the national guard. trump's blame game. facing reports his campaign is

finger at an old enemy. and home takeover. a family returning from vacation to find squatters living in their place. the house trashed. so why wasn't anyone arrested? good evening. thanks for joining us on this sunday. i'm tom llamas. we begin with breaking news in the south. an epic flood disaster now blamed for four deaths that have the national guard on the scene. incredible 7,000 rescues already. that number expected to rise. drivers stranded by flood waters for 24 hours. the coast guard also busy at work. this helicopter hoisting three people trapped on their roof top amid rising waters. and the devastation from the sky. take a look. drone footage revealing the full extent of the state of emergency. some rivers still expected to rise.

the forecast in a moment but first, abc's phillip mena in the flood zone tonight. >> give me a knife, give me a knife. >> reporter: tonight, thousands caught in the flood zone still trying to escape. this convertible sinking by the second, a woman and her dog trapped inside. nothing is working. finally, david phung jumps in, pulling her out by her arm. >> get my dog! get my dog! >> her dog. >> reporter: seconds later, fishing her dog out too. all day we have been seeing boat after boat filled with evacuees, and these rescues have been made not be emergency responders but by neighbors helping neighbors. many stranded in their cars on interstate 12, some for over 24 hours without food or water. >> day two, they're trying to

>> as you can see behind me, a lot of the interstate is actually flooded. we've been here for about 30 hours now. >> reporter: and more forced to abandon their homes, taking no chances with possibility of rising waters. where are you going to go from here? >> where i'll go from here? just like i did for katrina. start all over again as long as i'm living. >> reporter: four losing their lives so far. 5,000 living in shelters. and this, our first look inside the flood zone. waist-deep water. this business, ruined. but amid the disaster -- >> we don't have service. >> we're happy to see you. oh, lord, we're happy you see you. >> reporter: stories of hope and reunion. >> phillip mena in baton rouge tonight. the water is still rising in the neighborhood where you are standing. and there is another problem for rescue teams and residents? >> reporter: yeah, tom, the streets are flooded in many areas.

cell phone service has not been working all day. at&t says they are aware of the problem. but like everything else, it's flooded out here. >> we can see the semi trying to navigate the waters. phillip, thank you. and a deadly heat wave has millions under heat alerts tonight. the heat index pushing into triple digits from north carolina to massachusetts. three fatalities in philadelphia alone. abc's rob marciano is in a hot and humid new york city tonight. rob? >> reporter: tom, these ci and the concrete is retaining and radiating all the heat. it's going to be another hot one tonight. and take a look what it felt like along the big cities, 107 in d.c. and 101 in boston. tomorrow, i wouldn't say we're cooling down but it's not quite as hot. 100 degrees in d.c. more significant cooling later in the week. the devastating flooding in

mid south and the midwest. flash flood watches from arkansas and indiana through at least tuesday night. tom? >> rob marciano tonight, thank you. next to rio where ryan lochte and three other team usa swimmers were robbed at gun point. recounting a flightening scene. suspects flashing police badges before ordering them to the ground. when lochte refused the situation, it took a more dangerous turn. matt gutman on rio's darker side. >> reporter: tonight, organizers are scrambling after lochte and his teammates were held up at gun point earlier in morning. ryan lochte was in a taxi with teammates after an evening out and was stopped by a man in police uniform. he told nbc news -- >> he pulled out a gun, he tapped it. and put it to my forehead. i put my hands up, said,

apparently partying at a friend's house and at this clus. and confusion, with the ioc stating that lochte had not been held up at gun point. >> they spoke and said it wasn't true. >> reporter: later, they said the incident did happen. that makes up for the latest for the organizers who guaranteed the safety of athletes. >> to make rio the safest city in the world during the games. >> reporter: almost daily here. a belgium judo player attacked. equestrian venue was twice hit with bullets. last week, we joined the s.w.a.t. team to see the city without the tourist attractions. everybody wears this going out? >> everybody has to. they have to. >> reporter: they are always prepared to fire back. it feels like when you go out of this perimeter like you're going into war. everybody's ready to fight. >> yeah. >> reporter: and this is how it is every time you leave this

>> reporter: we have learned the u.s. state department is assisting in the investigation. and the security situation unlikely to improve, they are reiterating the security to remind them it's probably not a good idea to take a local taxi at 4:00 in the morning here. tom? >> not a good idea is right. thank you. we have more on the games later. next to milwaukee. the national guard called in after simmering tensions between police and residents boiled over. take a look at this. police cars set on fire. protesters hurling rocks at officers and one on of them opening fire after police shot and killed a 23-year-old black man they say was armed. tonight, police are revealing details about the threat the

eva pilgrim tonight. >> reporter: cars are turned over. the police shooting after an allegedly armed black man after a traffic stop. >> this is police, leave the area. >> reporter: as people ran for cover through smoke-filled mayhem, sounds of gun fire, targeting police. >> gun fire. >> reporter: this another up in flames. a gas station, an auto parts store, and a bank, six businesses in all torched. the suspect, now being identified as sylville smith, was armed, according to authorities, he set off on foot after being stopped. an officer ordered him to drop his weapon, and when he didn't comply, fired several rounds, killing smith. the officer was wearing a body camera. >> he had a gun in his hand.

are recovering was stolen in a burglary along with ammunition. >> reporter: this man says he was smith's brother. >> i don't know when it's going to end. we're not the one's that's killing us, you're killing us. >> reporter: tonight, the shell of destruction visible. businesses destroyed, 17 arrested, four officers hurt. a 17-year-old girl hit chaos. thoughts have not released the body camera video. and tonight, they hoping it's not a repeat of last night's violence. tom? >> thank you. georgia, there is a hunt for suspect in the fatal shooting of a police officer. tim smith was responding to a call about a suspicious person

hospital where he later died. authorities have identified him. he is considered armed and dangerous. next tonight, the race for the white house and donald trump feeling the heat on the campaign trail. the gop nominee saying he is not really running against hillary clinton. instead, trump focusing his attention on one of his favorite targets. here is mary bruce. >> reporter: tonight, donald trump at war with the media. >> i'm not running against crooked hillary. i'm running against the crooked media. that's what i'm running against. >> reporter: trump blaming the press for his tumbling poll numbers, tweeting -- "if the disgusting and corrupt media covered me honestly and didn't put false meaning into the words i say, i would be beating hillary by 20%." and he's ripping into the "new york times" after it published this blistering report about turmoil in his campaign. >> the newspaper is going to hell. maybe we'll start thinking about

camp is doing damage control, running mate mike pence reaching out to top republicans like john mccain and jeb bush, hoping to calm party nerves. but many republicans worry he's already headed for defeat. even trump is raising the possibility. >> can you imagine how badly i'll feel if i spent all of that money, all of this energy, all of this time, and lost? >> reporter: in a bizarre move, that i had will always tell him the truth and admitting to other voters -- >> i might lie to you like hillary does all the time. but i will never lie to jackamo. all right, you hold me to it. >> reporter: tom, trump will get back to the issues tomorrow. delivering a detailed speech in ohio on his plan to tackle terrorism. as one campaign source tells us tonight trump just needs to focus on beating

next, an update on the murder investigation of a female jogger in massachusetts. authorities saying tonight they are getting hundreds of tips as they hunt down the person who killed vanessa marcotte. and there's a possible new lead tonight. here is adrienne bankert. >> reporter: tonight investigators narrow their search for a killer, submitting dna samples of at least one potential person of interest in the case of 27-year-old vanessa marcotte. >> this could be a significant juncture in this case, and they're going to focus in on one particular individual. >> reporter: the google account executive and avid runner found murdered and badly burned last sunday, just hours after taking an afternoon jog in princeton, massachusetts, half a mile from her mother's home. authorities saying marcotte put up a fight. >> we believe that there was a struggle that may have resulted in her killer receiving

involving a young woman murdered while jogging in broad daylight. karina vetrano was killed in queens, new york. >> we understand there are some similarities. nothing has been ruled out. >> reporter: in princeton tonight, loved ones and supporters gathering for a run in marcotte's honor. investigators in marcotte's case now following up on the nearly 600 tips they've received so far. tom? >> adrienne, thank you. back to rio now where the historymaking olympic run continues for the world's greatest gymnast. we have a spoiler alert for you. simone biles with a record third gold medal today. the first american woman to win on the vault. and tonight on the track, where usain bolt will try to defend his crown as the world's fastest man. and take a look at the medal count. team usa continuing a dominant run in rio. here is abc's t.j. holmes. >> reporter: simone biles shattering records tonight. that gold in the vault makes her the first u.s. female gymnast to win three gold medals at a single olympics. my "gma" colleague amy robach talked with biles and her

expectations. >> that's a lot of pressure when people expect you to win gold and then you did it. did you know you were gonna do it? >> we were confident. >> yes, we were very confident once we went out there. if we had done the same thing in training, then we were very confident of the outcome. >> reporter: u.s. dominance doesn't end in the gym though. michael phelps, the world's greatest olympian, won his 23rd gold medal in saturday night's relay, the crowning moment in a career that he says is now overh pool, nicknamed "the swamp," now clearing. one of the algae-infested green water pools drained and replaced with clean water. and tonight, the title of fastest man on the planet is up for grabs. usain bolt looking for an unprecedented third straight gold in the 100 meters. but his mom wants him to slow down. >> i would hope he'll settle down, get married and start his family. >> reporter: and tom, team usa

after today, it's become the first team ever to earn over 1,000 medals at the summer olympics. and of course, we're still counting. >> thank you. there will be more of amy robach's interview with the gold medal winning five on "gma" tomorrow. still ahead. real life home wreckers. what woman found returning from vacation. squatters trashing her home. how did they pull it off? why weren't they arrested. and a dangerous flare-up. how the swirling flames stop firefighters in their tracks. and will superstar adele form at the super bowl halftime show next year? what she told fans at a sold-out concert. when you have a digital notebook to capture investing ideas that instantly gives you stock prices, earnings, and dividends...

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neighborhood to find her house had been taken over. here is abc's lauren lyster. >> reporter: tonight this, house trashed by total strangers, the floors scratched, garbage everywhere and no one is in jail. >> it was awful. it looked like i was in some kind of homeless shelter with mattresses everywhere. >> reporter: alleged squatters moving into crystal taylor's oklahoma house, all while she and her fiance are on vacation in cabo. neighbors alerted her. >> they broke into my home, they crawled underneath the garage door, they have vandalized the home, and nothing is being done. it should be breaking and entering. >> reporter: police responding, but the alleged squatters providing a lease, claiming they were the victims of a craigslist scam. >> i know it reeks. it looks bad on us. when we go another place, we will research the house before

>> reporter: authorities still investigating but making no arrests. >> once the police are called, they don't have the ability to make decisions on who is right or wrong. >> reporter: experts say the best strategy here is prevention -- make the house look occupied, have neighbors check on your home if you can't, and set up a google alert with your property address so you know if anyone is listing it online. and have a copy of documents available that prove you are the homeowner. experts say this encourages police to treat squatters as trespassers. tom. >> thank you. on a massive apartment fire. the search of missing victims after that fiery blast. what authorities are saying tonight. and into the wild. the mama bear is nervously watching her cubs get washed away over a waterfall. what she does next coming up. eat more fiber. flax seeds. yogurt. get moving. keep moving. i know! try laxatives. been there, done that.

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wednesday night. four other people are still missing. the cause is unknown. firefighters getting a surprise in oregon. check this out. a steady gust of winds whip this firp up in a firenado before it died down. now to a lesson in parenting from a wild family. the scene streaming across the world. a bear watching as her plunge over a waterfall. a bear cam watching it all. and that moment when instinct kicks in and mama bear jumps in to pull the cubs to safety. and sorry, adele fans. but the "hello" singer made it very clear she won't be performing in the super bowl halftime show. telling phones, that show is not able music and i can't dance or anything like that. still ahead.

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teenagers can give their parents l here is john donvan. >> reporter: when joe iosco began unwrapping a present at a family get together, no one watched his face more intently than the women on either side of him. sally to the right, lauren on the left. >> it was still like, "how's he going to react? am i going to make him cry?" >> reporter: now, joe is sally's boyfriend, a relationship that began when lauren, who is sally's daughter, was a year old already. so joe's been in lauren's life since she can remember. >> i was only with my biological father every other weekend but i was with joe almost every day. >> reporter: and during that

>> he did things for me, and he took me places. >> as the years went by, i not only fell in love with sally, but i fell in love with lauren as well. >> reporter: now the surprise inside the box was a framed poem of appreciation from lauren, and that got joe crying already. but then, he discovered the envelope with a set of legal documents inside. we'll let the video explain the rest. >> i am asking joe to t >> yes. >> reporter: people say joe's a man of few words. maybe. >> in the end she chose me, and there's no better gift than that. >> reporter: few words, but perfect for this picture. john donovan, abc news. vrnlg perfect. david muir back here tomorrow night. i'm tom llamas.

,, man, tonight's grand prize is huge! really huge. [ scoffs ] a trip to the walt disney world resort in florida and a trip to the new shanghai disney resort in china! china! [ scoffs ] but i can't give away a prize this big without some help. but who's big enough to help me give away this prize? ? a-ha! ? the only one who could help give away a prize this big is the main mouse himself. mickey! ? hey. oh, s-sorry.