tonight, breaking news. the grim discovery near the border. a tractor-trailer parked at a texas walmart in sweltering conditions. eight people found dead inside. another just died at the hospital. and children also crammed inside that truck. what we've just learned about the driver. washed away. a man missing tonight after violent floods crash through his home. a state of emergency declared. the new flash flood watches, as dangerous storms push east. plus, our team on the isis front lines in syria, as coalition-backed forces attempt to drive out the islamic state. power to pardon. the new conflicting messages from the white house about whether the president is discussing pardons. will he issue them, perhaps even for himself?

and, vacation dangers. an american college student drowns while drinking at a mexican resort. tonight, the shocking stat about some of the alcohol served in that country. good evening. it's great to have you with us on this sunday. i'm tom llamas. we begin with the carnage in san antonio. a tractor-trailer loaded with immigrants, in the sweltering heat. police finding 38 people packed inside. nine have died. the grisly discovery in a walmart parking lot. 30 people rushed to the hospital. the horror revealed after someone from inside the truck approached a worker, asking for water. that worker calling for police.

now investigators saying there may have been as many as 100 people in the truck. and tonight, the driver is in custody. here's kenneth moton. >> reporter: tonight, a horrific and deadly case of human smuggling in san antonio. federal investigators say 38 immigrants inside this tractor trailer suffocating in excruciating heat. >> folks were literally baking in the heat, and did not have access to water. >> reporter: just after midnight, officials making the discovery. the trailer in a walmart parking lot with no air conditioning. eight dead, 30 more rushed to the hospital. 20 in critical condition. suffering from traumatic brain injuries from heat stroke and dehydration. most of them adults in their 20s and 30s but at least two are young children. tonight, one more dying at the hospital, bringing the death toll to at least nine. the u.s./mexico border just 50 miles away. the victims could have been in that truck for hours. temperatures inside, as hot as

140 degrees. police say video shows survivors jumped out of the truck before being discovered. an employee called 911 when he spotted a man who was desperate for water. prosecutors say the driver, james matthew bradley, has been taken into custody. >> it was a mass casualty situation. we treat it just like an airline crash. or any kind of incidents. >> kenneth, joining us live from one of the hospitals treating the victims. authorities saying there may have been up to 100 people crammed into the truck? >> reporter: yes, as many as 100 people were in the back of the truck. right now, agents are looking for the survivors who ran. some jumped into waiting cars. all of this as undocumented immigrants fight for their life in the hospital. >> kenneth, thank you.

let's move now to washington. the russia investigation kicking into a new gear. one member of president trump's inner circle, jasred kushner, will testify monday. and there are mixed messages from the white house about whether the president is discussing pardons, and the ability to pardon anyone, even himself. here's david wright. >> reporter: the president tweeted this weekend, all agree the u.s. president has the complete power to pardon. >> i'm in the oval office with the president, we're talking. he said he brought it up. but he said he doesn't have to be pardoned. there's no one around him that has to be pardoned. he was just making the statement about the power of pardon. >> reporter: the constitution gives the president broad powers

to pardon, but a president has never pardoned himself. president trump's personal lawyer says there has been no mention of pardons. >> the legal team is not researching the issue, because that is not on the table. there's nothing to pardon from. >> reporter: today, the new white house communications team was on the offensive. >> listen, there's obviously a communications problem. >> reporter: trying to change the talking points. >> the top three issues americans care about are health care, immigration, and jobs. the top three issues the media cares about are russia, russia, and russia. >> somebody said to me yesterday, i won't tell you who, if the russians hacked this situation, and spilled out the e-mails, you would have never seen it. >> reporter: when pressed about his source? >> how about, it was the president. he called me from air force one, he said, maybe they did it, maybe they didn't do it.

>> reporter: this week, the president's son-in-law heads to capitol hill to be interviewed behind closed doors by the senate and house committees investigating russian meddling. this weekend, kushner revised his financial disclosures. having inadvertently left out 77 income sources. he and his wife reported personal assets of between $226 million and $760 million. >> and david, we're not expecting to see don junior or paul manafort, correct? >> reporter: yes, the committee said the two agreed to negotiate to share documents. committee members obviously have a lot of questions for them. and they are hoping to see them at later date. tom? >> david, thank you. we now head to the

frontlines in syria. the u.s.-led coalition is looking for a knockdown punch against isis. pushing them out of their head janua headquarters in the city of raqqa. here's ian pannell. >> reporter: tonight, driving into the heartland of isis. going forward with american-backed forces. until recently, the militants controlled this land. >> going to the front lines with the christian fighters who are taking on the militants. the fighters take us to a makeshift mosque set up by isis. this is the flag of isis here. we find evidence of drug abuse. you can see the needle there. a sign of the pressure the militants now face. america is sending vehicles and guns to local forces. foreign volunteers have joined the fight against isis from america to europe.

>> the least i can do is fight and resist them and fight back. >> reporter: let me just explain. the sound you can hear. a u.s. military base is nearby. mortars going out. >> i think the morale of the american war machine gives is incredibly strong. >> reporter: sozdar bawer leads a unit of local volunteers on the front line. the young syrian kurd joined straight from high school. [ speaking foreign language ] >> reporter: she's says she's fighting to protect and liberate the people. but she's worried her troops don't have the guns or protection they need. this is the enemy. isis in raqqa, standing and fighting to the death as shown in their own propaganda film. we've come up to one of the front line positions. the fighters are holding this ground, trying to protect the other fighters trying to move forward.

they've been attacked by isis snipers. life ends quickly here. the day after we met sozdar, she was killed. she was just 24 years old. im -- it seemed everyone we met has lost a loved one or knows someone who has died. tom? >> ian, thank you. and more of the reporting from the isis front lines on "gma" in the morning, and on "world news tonight." in london tomorrow, a final hearing for the parents of charlie gard. on life support, suffering from a fatal genetic illness. they're suing for permission to have an experimental treatment. medical authorities in the uk believe it will only prolong his suffering. the judge is promising to have a decision by tuesday. back here at home to the extreme weather. flash flood watches in the no h northeast at this hour.

in kentucky, homes broken or washed away. the search for a man missing. and a power line catching fire after being brought down by fallen trees. here's adrienne bankert. >> reporter: tonight, destruction across the midwest. powerful floodwaters ravaging entire towns and the storm is not over yet. this home carried two football fields away from its foundation in kentucky. look at it, teetering on the end of a river. >> we looked around, seen the outside neighbor's house and our neighbor's house was turned and we just got out. >> reporter: dozens more, rescued from the raging waters. >> be advised, woman in her car the water is up to her knees. >> reporter: tonight, the desperate search for one man, missing after his house was swept away. up to half a foot of rain, overwhelming streets, piling up cars. others now left stranded. >> this is epic for us. we've never had anything like this. >> reporter: nearly the entire town of fairbank, iowa desperately filling sandbags, trying to barricade their homes.

a similar scene in illinois. the galena river still rising. >> there's a storm coming, and lightning is on its way. and in indianapolis, race officials temporarily suspending the brickyard 400 after lightning was reported in the area. the storms moving east. in new york, we're under a flash flood watch. in the midwest, a painstaking wait for the waters to recede. tom? >> adrienne, thank you. we want to get more from kait parker, in for rob marciano. >> reporter: the flood watches aren't just for new york city. extending into d.c., baltimore. we're still looking at a risk of severe weather. the clouds have kept a lot of the severe weather at bay. but overnight, from d.c. to buffalo, we could see strong storms that could have hail and damaging winds.

so, be alert on that. heading into monday, the rain could still be sticking around. tom, you may want to prepare for a messy monday morning commute. >> kait, thanks. next, as the 20th anniversary of princess diana's death approaches, her sons are sharing memories. her lug -- hugs, laughter, and her mischievous side. here's eva pilgrim. >> reporter: tonight, william and harry's intimate portrait of princess diana. speaking for the first time about the mother only they knew. on the 20th anniversary of her death, the sons cherishing her memory in this new documentary. >> this is the first time that the two of us have ever spoken about her as a mother. arguably, probably a little bit too raw up until this point. it's still raw. >> reporter: william saying he thinks of his mom every day. harry recalling her playful nature. >> all i can hear is her laugh in my head.

and that sort of crazy laugh of where there was just pure happiness shown on her face. one of her mottos to me was, "be as naughty as you want, just don't get caught." >> reporter: harry can still feel the hugs his mom used to give. both sons still agonizing over their last phone call with her, the night she died in paris. harry speaking of the deep regret over rushing off the phone. "if i'd known that was the last time i'd speak to my mother, the things i would have said to her. looking back on it now, it is incredibly hard." >> there's not many days that go by that i don't think of her. her 20th anniversary year feels like a good time to remember, you know, all the good things about her and hopefully provide maybe a different side to her that others haven't seen before. >> reporter: william also says he thinks diana would have loved being a grandmother.

he jokes that he feels pretty certain she'd be the type that would show up around bathtime, getting the kids all riled up right before bed. tom? >> which means they wouldn't go to sleep. eva, thanks so much. there's still much more ahead on "world news tonight." the manhunt in a national forest. armed with a gun. some campers told to stay out. plus, vacation dangers. the new concerns after an american college student dies drinking at a resort bar in mexico. tonight, the shocking stat about alcohol in that country. and the massive inferno at an apartment complex in massachusetts. the urgent effort to stop the fire from jumping to other buildings. stay with us. your body was made for better things than rheumatoid arthritis. before you and your rheumatologist move to another

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tourists traveling to mexico. after an american college student drowned after drinking at a resort bar. now, a shocking stat about some of the alcohol served in mexico. here's marci gonzalez. >> reporter: tonight, the death of a young wisconsin woman triggering new concerns about the cocktails at some popular resorts in mexico. 20-year-old abbey connor died in january during a family vacation at a five-star all-inclusive resort in playa del carmen. her family suspects her drinks were somehow tainted and they're not alone in their concerns. are 2015 report finding 43% consumed in mexico is produced illegally. officials there seizing nearly a million and a half gallons of bootleg liquor from hotels and bars. they say could be infused with grain alcohol or methanol. >> is someone putting alcohol in the drinks or is it tainted? i'm not sure. is it a combination of two? >> reporter: after her son

drowned, she started a website where dozens are sharing their nightmare experiences. >> people are going from being perfectly fine to being blacked out in an instant. >> reporter: one of them, jamie valeri, describing to the "milwaukee journal-sentinel" how she and her husband both blacked out for hours at a resort in playa del carmen, after just a couple of drinks. >> i could hear him scream but i couldn't see him. his voice screaming, "jamie, jamie, get up. we've been drugged." >> reporter: the u.s. consulate in mexico says it is aware of the reports, but is not issuing any new warnings for travelers. tom? >> marci, thank you. and more from the families and their concerns tomorrow on "good morning america." when we come back, the alligator who lost its way. take a look at this video. the mystery gator swimming near miami beach. witnesses stunned. we'll tell you how it ends. and the two of hearts worth more than $8 million, as lady luck strikes in vegas for an accountant. stay with us. i needed something more to help control my type 2 diabetes.

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time now for our "index." and a massive fire destroying a five-building apartment complex outside of boston. the eight-alarm blaze, drawing firefighters from several towns. explosions and high winds complicating the fight. a nearby senior citizen home was evacuated. the apartment buildings, which were nearly complete, reduced to a smoldering pile of debris. the cause remains under investigation. and a manhunt is under way inside a north carolina national forest. police say 38-year-old phillip michael stroop is armed and dangerous somewhere in the pisgah national forest after fleeing authorities in a car chase, then stealing a bicycle at gunpoint and pedaling into the woods. he was spotted today by a camper. part of the forest is closed for the search. stroop has a history of violence. a new jersey man is $8 million richer, and has a deuce of hearts to thank. scott blumsteen, a 25-year-old with a degree in accounting, won the final hand at the world series of poker with a pair of twos.

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finally tonight, the comeback. the olympic high jumper, paralyzed in an accident, making a promise to his bride to be. that's olympian jamie nieto soaring to new heights. but a freak accident recently crushed his dreams -- and his neck. >> i'd definitely like to thank god that i'm still alive. >> reporter: from his hospital bed just days after his surgery, jamie described what happened. >> i hit my head doing a flip. and my disc in my neck slipped and hit the nerve and paralyzed me. >> reporter: making things even worse, he was about to get married. >> a lot of things come into perspective when something like this happens. >> reporter: jamie vowing to his fiancee he we would walk down the aisle with her. >> i think i had a little anxiety because i wanted to walk the best i could walk. >> reporter: so jamie started intense physical therapy, learning to walk again. building back his muscles to

show his wife he wouldn't break his promise. and on their wedding day jamie started out on a walker to preserve his strength as he put on his tuxedo. then came that moment, after the new couple said i do. this home video is shaky, but you can see jamie slowly taking the first steps with his new wife. >> it's really a special day to see him walk down that aisle and to have him there on my arm. >> reporter: jamie's life has changed so much and though he can't compete against other olympians, he's taking that same drive to fuel his personal comeback. >> you just keep pushing and fighting and every time you fall you get back up and try it again. so tonight we salute jamie. and we thank you for watching. "gma" first thing in the morning. david muir will be right back here tomorrow night. i'm tom llamas in new york. have a great evening. good night.

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to help cover your early termination fee. go to fiosgigabit.com ribeiro: here's a sneak peek at tonight's "afv." we know you're gonna love it. ♪ woman: oh, my god! man: say goodbye to the christmas tree. -she is on a hover -- -aah! ♪ all: ♪ happy birthday to you ♪ welcome to "america's funniest home videos." and now, here he is, the host of our show -- alfonso ribeiro. [ cheers and applause ] ♪