the caribbean." and the nypd tonight on the attempted sexual assault in broad daylight. the states of emergency, catastrophic flooding in the midwest. a major dam at risk of failing. residents warned to be ready to evacuate. deadly rip currents up and down the east coast. in new york city tonight, two teenage boys swept out by a large wave. 80 million americans under heat alerts from california all the way east. ginger zee is here. the deadly shark attack off hawaii. a well-known surfer killed, suffering multiple shark bites. the victim also an actor who appeared in several tv shows and "pirates of the caribbean." here in new york city tonight, an urgent search for a suspect wanted for attempted sex assault in central park. tonight, the chilling new video showing the moment three hostages were taken by hamas, including american-israeli hersh goldberg polin, still being held. in the video, one of the terrorists saying he wanted a selfie with their hostage. his arm had been blown off. tonight, the interview here, his parents on why they want the world to see the images. and what whbenjamin netanyahu signaled tab war in gaza right now. the race for the white house tonight. just three days now until the earliest ever presidential debate. tonight, what we now know about the preparations, how president biden is getting ready, and what donald trump is now saying about the president's ability to debate. the remarkable kidney transplant here in the u.s. >> are you awake, john? >> david: the patient in chicago awake during the procedure. the missing hiker who went for a three-hour hike now rescued after ten days alone. the emotional reunion. also tonight here, the american woman, a tourist missing in the bahamas for several days now. and four small earthquakes reported in california, all within just two hours. one in los angeles. good evening and it's great to start another week with all of you at home. we begin tonight with the extreme heat. severe storms, dangerous flooding, a dam here in the u.s. at imminent risk of failure. tonight many than 80 million americans from california to the midwest and the east still sweltering in dangerous heat. there are states of emergency with rivers still rising, and in the east, dangerous rip currents. in new york city, authorities believe two teenage boys were swept out to sea. tonight, those heat alerts from california to minnesota to florida. triple digit temperatures and the heat index when you factor in humidity well above 100 for millions. a disaster emergency in western iowa. look at this. hundreds of homes under water tonight. up to 18 inches of rain in recent storms. in north sioux city, south dakota, a railway bridge ripped in two by record high waters there. and near mankato, minnesota, a dam at imminent risk of failure. ginger zee has the forecast, and abc's erielle reshef leading us off with the images tonight. >> reporter: tonight, record-breaking floods threatening to burst a dam. days of rain crippling communities in the upper midwest. the rapidan dam near mankato, minnesota, in the southern part of the state, at risk of imminent failure. authorities warning residents along the blue earth river to be ready to evacuate. the danger coming after days of storms dumped up to 18 inches of rain in some sports, sending rivers over their banks, engulfing whole neighborhoods. and destroying crucial infrastructure. our melissa adan outside sioux city, iowa. >> this railway bridge ripped apart by the raging river, you see the gushing water. officials say it crested at 45 feet. that's historic levels. forcing many that live nearby to evacuate. >> reporter: iowa's governor says nearly 2,000 homes and businesses sustained damage, hundreds destroyed. south dakota's governor telling reporters today that floodwaters killed at least one person in the state. >> in case we needed any reminder of the destructive nature of water, we are seeing it in real-time today. >> reporter: the extreme heat fueling extreme storms in the east. in the last 24 hours, multiple tornado warnings in new england. meanwhile, families seeking relief from the heat at our nation's beaches are getting caught in dangerous rip currents. dozens of people rescued from north carolina beaches in recent days. and in new york city, authorities suspended the search for two teenage boys who were swept out by a large wave at jacob riis park. witnesses say they went under around 6:00 p.m. friday -- just moments after lifeguards had left the beach for the day. david, can you see it's extremely windy here. i can barely face the camera. you can also see there's red flag warnings behind me. lifeguards at a nearby beach say they rescued 12 swimmers just on sunday alone. and they say they're bracing for more in the coming days. david? >> david: erielle reshef, thank you. let's get right to chief meteorologist ginger zee, back with us tonight with the forecast. hi, ginger. >> hi, david. it was the first 100-plus degree temperature in june in 12 years for washington, d.c. and baltimore over the weekend. and now, that heat is focused tomorrow mostly in the middle of the country. from omaha and the excessive heat warnings to greenville, mississippi, that could see feels like upwards of 116. a couple pockets of excessive heat for salt lake and palm springs. but the risk area is really focused along that florida panhandle, back to little rock, and a big part of that is not just the afternoon highs or the feels like when the sun is out, but when you are asleep and how warm it stays. we could see record overnight low highs, if that makes any sense to you. also, yes, riding along that ridge with some frontal action, a low pressure system tonight. you could see a der ray choe, or a long line of storms with imbedded or isolated tornadoes, mostly 70-plus-mile-per-hour wind. and finally, these are the next two days for severe weather. david? >> david: ginger zee with us again tonight. ginger, thank you. we turn now to the deadly shark attack off hawaii. a well-known surfer who acted in tv shows and in "pirates of the caribbean" attacked and killed off oahu. here's matt rivers. >> reporter: tonight, in a rare fatal shark attack, world renowned surfer tamayo perry killed off the the island of oahu sunday afternoon. >> today's just a tragic loss. tamayo was a legendary waterman and highly respected. grew up right over here. >> reporter: the 49-year-old was out surfing in the waters off mala kahana state park when he was attacked. lifeguards recovering perry's body by jetski. authorities saying he appeared to have suffered from multiple shark bites. perry, a decades long surfer and veteran of the area ocean safety and lifeguard services. he also acted, making appearances in "hawaii five-o", "pirates of the caribbean", and "blue crush." >> what's up, tamayo? >> oh, hey, girls. >> how is it out there? >> oh, it's pretty nuts. >> reporter: his friend brian bielmann saying he ran into the surfer just the night before his death. >> all i can say is, he was -- he was a great christian man. he's with his mom in heaven right now. there's no doubt about that. he was an incredible surfer. everybody loved tamayo. >> reporter: also on sunday, in north carolina, police say a 14-year-old was treated for this shark bite to the leg at north topsail beach. >> 14-year-old male that was bit by a shark. >> reporter: bystanders pulling the teen from the water. he was later transported to the hospital and is expected to recover. despite natural fears, though, experts still say the chance of getting bitten -- extremely low. what's your message to people who are going to the beach this summer? >> so, based on what we're learning, not just in california or hawaii or massachusetts or florida, is that your probability of being bitten is so low, it really isn't something to worry about. >> reporter: david, that expert reiterating that fatal shark attacks are extremely rare. tamayo perry's death in hawaii, just the ninth fatal incident recorded in that state since it began keeping records nearly 30 years ago. david? >> david: matt rivers, thank you. here in new york city this evening, the nypd late today on the urgent search right now for a suspect wanted for attempted sex assault in broad daylight in central park. police say a 21-year-old woman was attacked while sun bathing. the victim fighting him off. abc's diane macedo from central park tonight. >> reporter: an urgent search is under way in new york's central park after police say a man tried to sexually assault a bomb s sunbathing in the middle of the day. the second brazen attack in a city park in two weeks. >> we have a female, white, 21, sunbathing. she sees a male black coming towards her, exposing himself. she screams and gets up to run. he tackles her from behind. >> reporter: police say the victim was able to fight the man off, who then ran away. now, nypd officers are scouring the park on foot, buy, and drone, with the victim riding in a patrol car to help the search. >> you see the massive response? we're going to keep central park safe and we're going to continue to be out here until we feel that this perpetrator is off the streets. >> reporter: the attack comes just days after a suspect was arrested for allegedly sexually assaulting a 13-year-old girl in a queens park after school, holding her and a friend at knife-point. and david, now the focus is on finding the suspect in this central park attack. police describe him as being in his 30s, about six feet tall, medium build with curly hair, and they say he was wearing a light shirt and shorts. david? >> david: diane, thank you. tonight, from israel, the chilling video now showing the moment three hostages were taken by hamas, including american-israeli hersh goldberg polin, who is still being held. in the video, one of the terrorists saying he wants a selfie with hersh's arm had been blown out. tonight, matt gutman with the interview with his parents. and a warning, it is difficult. >> reporter: just released video tonight showing hamas terrorists racing into gaza on october 7th. three hostages, including american hersh goldberg polin, bleeding in the flat bed. in the video released by the families of the hostages, hersh's head pulled back, with one of the gunman saying, "i want to take a selfie with him." hersh cradling his severed arm. all three seriously wounded when militants tossed grenades into the shelter where hersh and more than a dozen others had taken refuge from hamas' attack on the nova music festival. how does a mother watch her son go through that? >> i mean, i literally watched it a few minutes ago, so i think i'm still in shock, and i think that i -- will be figuring out how i feel. >> reporter: and we spoke to hersh's parents tonight. >> it's horrendous, this video. we agreed to release it, because horrendous things happened. it might still be happening and the world needs to know that. >> reporter: and tonight, israeli prime minister benjamin netanyahu signaling a shift in the war in gaza, saying the intense phase of fighting is about to end. military sources telling abc news the phase-down is just weeks away, but netanyahu stressing that does not mean the war is about to end. and israel also facing mounting questions in the west bank, after this disturbing video, soldiers strapping a palestinian man, 23-year-old mujahid abadi, to the hood of their armored vehicle. he was shot in the leg and shoulder, but the palestinian red crescent said they were initially prevented from treating him. the idf calling it a violation of orders and standard operating procedures and says it's investigating. and david, back to netanyahu's comments about the shift in the war. israeli sources telling me it would mean fewer israeli troops inside gaza, but that israel would still maintain buffer zones in the gaza strip, and launch targeted raids. amid all of that suffering in gaza, the goldberg polins telling me they are desperate for the world not to forget their son and the other hostages. david? >> david: matt, thank you. meantime, back here in the u.s., and the race for the white house. three days now until the earliest ever presidential debate. we will be showing the cnn debate right here on abc thursday night for you. tonight here, how president biden and former president donald trump are preparing for this return to the stage to face off again. here's mare rip bruce. >> reporter: tonight, president biden is hunkering down at camp david with over a dozen aides, preparing for the most consequential moment yet of this campaign. sources say one of biden's top goals on that debate stage, to hold donald trump accountable for his actions as president. and today, a preview. on the two-year anniversary of the supreme court decision to overturn roe versus wade, the biden campaign releasing this ad. the president speaking directly to camera. >> here's what donald trump says about your freedom. after 50 years of failure, with nobody coming even close, i was able to kill roe v. wade. decades of progress shattered, just because the last guy got four years in the white house. >> reporter: the first lady hitting that message, too. >> because donald trump is dangerous to our families and to our country. we cannot let him win. we cannot sit by while our freedoms slip away. >> reporter: trump has boasted about appointing the justices who overturned roe, saying abortion laws should be left up to the states, doubling down in washington, d.c. over the weekend. >> thanks to these justices, we have also achieved what the pro-life movement fought to get for 49 years, and we've gotten abortion out of the federal government and back to the states. >> reporter: unlike biden, trump is not formally preparing for thursday's debate, but he has held more than a dozen policy discussions. and though he has attacked biden's stamina and mental fitness for months, with the debate approaching, trump is now calling the president a worthy debater, saying he's not underestimating him. still, trump insists he has no debate strategy. in philadelphia, he polled the crowd. >> how should i handle him? should i be tough and nasty and just say, you're the worst president in history, or -- should i be nice and calm and let him speak? >> reporter: donald trump is now clearly trying to set expectations, describing the president as a worthy debater, and insisting he's not underestimating him. and of course, four years ago when they faced off the last time, we saw how chaotic those debates were. this time around, the candid candidate's microphone will only be turned on when it's their turn to speak. >> david: mary bruce, you'll be right here with me and the powerhouse political team. thank you, mary this is thursday night, again. you can watch the cnn presidential debate right here on abc. we will be simulcasting it. our team will be here start at 8:00 p.m. eastern, then the debate at 9:00 p.m., again, that's thursday night. mary, we'll see you then. when we come back here tonight, the search for an american woman missing in the bahamas for days now. also, four earthquakes reported in california, all within about two hours or so, including one in los angeles. and the kidney transplant in chicago, the patient awake the entire time. breztri for my copd things changed for me. breztri gave me better breathing, symptom improvement, and reduced flare-ups. breztri won't replace a rescue inhaler for sudden breathing problems. it is not for asthma. tell your doctor if you have a heart condition or high blood pressure before taking it. don't take breztri more than prescribed. breztri may increase your risk of thrush, pneumonia, and osteoporosis. call your doctor if worsened breathing, chest pain, mouth or tongue swelling, problems urinating, vision changes, or eye pain occur. ask your doctor about breztri. 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[sniff] still fresh. ♪ get 6x longer-lasting freshness, plus odor protection. try for under $5! if you have chronic kidney disease you can reduce the risk of kidney failure with farxiga. because there are places you'd like to be. farxiga can cause serious side effects, including ketoacidosis that may be fatal, dehydration, urinary tract, or genital yeast infections, and low blood sugar. a rare, life-threatening bacterial infection in the skin of the perineum could occur. stop taking farxiga and call your doctor right away if you have symptoms of this infection, an allergic reaction, or ketoacidosis. ♪ far-xi-ga ♪ finally tonight here, it was supposed to be a three-hour hike. ten days later, the emotional reunion. tonight, in the santa cruz mountains, santa cruz county, california, one incredible rescue. more than 300 people, emergency personnel and volunteers in search of a man who had been missing for someone than a week. 34-year-old luke mcklis sh. he told family and friends she was going for a short hike, but he never showed up for his dad's father's day dinner. the cboulder creek fire department, california state parks, search dogs, too. ten days later -- luke was found. the molt he reunites with his family, his face covered in dirt, his family hugging him. rushed to the hospital, no major injuries. tonight, he's home, recovering, telling our station in san francisco kgo, he's doing okay. >> i'm sore, a little tired, i lost my voice. >> david: luke says he knows the trails, but got disoriented after fires scorched the landscape. this is all he had with him. >> i left with a pair of my pants and my pair of hiking shoes, and a hat. i had a flashlight and a pair of folding scissors, and that was about it. >> repor >> david: drinking water from his boot. >> i made sure i drank at least a gallon of water every day, but then after, like, getting close to the end of it, i was just, my body needed food and some type of u.s. is nation. >> david: luke so moved by how many people were out looking for him. >> it was just really humbling and -- i don't know. >> david: his family grateful. >> relieved. >> so thankful and blessed. >> david: tonight, luke joking, he might take a break from hiking. at least for awhile >> i did enough hiking for probably the whole rest of the year. >> me, too. >> we've all hiked a lot. >> david: well, lushgs we're just glad you're alive and well and we understand that break from hiking. i'll see you right back here tomorrow. good night. i plan to be 100% transparent and cooperate fully with this investigation. and i want to be crystal clear. i have done nothing wrong. i can tell you with confidence that this investigation is not about me. i have not been charged with a crime and i am confident that i will not be charged with a crime because i am innocent. >> four days after federal investigators raided her home, the mayor of oakland broke her silence, addressing her constituents. good afternoon. i'm kristen sze. >> and i'm julian glover. not only did mayor qingtao repeatedly say she was innocent, but she also expressed anger for not being given an option to cooperate with investigators, a courtesy that she claims has been given to other public elected officials in similar circumstances. >> let's get right to abc seven news reporter ryan curry. >> he was there when the mayor addressed the city. he now joins us live outside of oakland city hall. ryan >> yeah. julie and kristen. good afternoon. the mayor was emotional at times while reading her statement. she wanted to make one thing clear that she is not resigning. oakland mayor shengtao, appearing publicly for the first time since the fbi raided her house, law enforcement