on this saturday night, deadly heat. millions of americans under heat warnings this first weekend of summer. ato ghnit, a tragic reminder of just how dangerous the high temperatures can be for children. fire fallout. hundreds are evacuated from apartment buildings in britain because they contain the same materials that led to that deadly towering inferno. swiftwater warning. record snow melt is putting first responders on high alert. daring procedure. why some patients are willing to be infected with a disease to live longer. and artful escape. inside a chicago program that's keeping at-risk youths safe and

glasswork. "nightly news" begins now. >> announcer: from nbc news world headquarters in new york, this is "nbc nightly news" with kate snow. >> good evening. jose is off tonight. on this third day of summer, extreme heat has taken over much of the western u.s. temperatures as high as 120 degrees in some places and 27 million people under excessive heat warnings and advisories and the heat has been deadly. in less than a month, six children have died after being left inside hot cars. the latest, just last night. katie beck starts us off with the danger and new pressure to change the law. >> reporter: terrifying moments this week. a child trapped in suffocating heat. an indiana officer rescued a 4-month-old baby who they say was trapped inside a car for more than two hours. scenes like this captured on camera so

>> you left her in your car! >> i'm sorry! >> no sorry. she could have died! >> reporter: and too often they end tragically. last night in houston, a boy died after his father forgot him inside. cynthia randolph was arrested in the connection in the death of her two young children. they died in her car after she admitted to locking them inside as punishment while she sle slept. the temperature in a car can rise up 20 degrees in just ten minutes but some parents are not getting the message. the scenario that you've seen so many times, i'm going to run into the store and be right out, how dangerous is that? >> it's very dangerous. >> reporter: summer has just begun and already 13 children have died in hot cars this year alone. >> excessive heat warning stays with us. >> reporter: and with excessive heat sweeping the

the danger is growing. >> if it's 90 degrees outside, it can be 135, 140 degrees inside the car. >> reporter: and a child's chances inside a hot car are far worse than for an adult. >> they have more muscle mass, more fat, more fluids. as the temperature goes up, they can tolerate it better. >> reporter: there's a push for a new bill that's receiving bipartisan support requiring a vehicle to be equipped with a safety alert system so an alarm will go off if a child is left in the back seat. it's an effort to protect the most vulnerable passengers that can mean the difference between life and death. first responders say the toughest part about children in hot cars, those situations are completely preventible. over the past 20 years, 700 children have died in hot cars. the majority of those deaths caused when a caregiver simply forgets the child in the back seat. kate? >> such an important

catie, thank you. scary moments on florida's gulf coast when a small plane crashed into a daycare in ft. myers. the plane flipped as it hit the roof as you can see in that security video. the aircraft then burst into flames. one person on the plane was killed aanother injured. the cause of the crash is under investigation. it is a critical weekend for the new senate health care bill. so far, five republicans have bucked their own party coming out against the plan. this as president trump tweets about it today. kelly o'donnell has all of the developments this evening. >> reporter: taking the polls today in bowie, maryland. >> i'm concerned about the costs. >> reporter: democratic senator chris van hollen urges those anxious about a health care overhaul to pressure wavering republicans. >> we nee t

do the right thing by their constituents, not by the party bosses in washington. >> reporter: the president on the move today and trying to close the deal on an obamacare repeal. >> with a health care system that you deserve. we'll get it done. >> reporter: to coaxing phone calls. sources say president trump is reaching out this weekend. he's already spoken to ted cruz, one of five republicans publicly opposed to the senate health care proposal. republicans can only lose two votes from their members. a razor's edge margin, the president will la meant it in tomorrow on fox news. >> come up with something that everybody is happy with. it's so easy. but we won't get one democrat vote, not one. >> reporter: and on twitter this morning, "democrats slam gop health care proposal

[000:05:59;00] increase by over 100%." a twitter push from mike pence today, too. he could become the senate's tiebreaker vote. promising a repeal before summer's out. and with the senate vote expected this week and a congressional budget office score on the coast, implications of the bill due monday, sources close to the process say they are bracing for the bill to die and be revived a few more times before a final outcome is known. and kate, tonight the trump administration is turning from votes to vows. the president and first lady, the pences and a number of cabinet officials and senior white house staff are attending the wedding of treasury secretary steve mnuchin and an actress from scotland. it is a high society and high-security event here in washington. kate? >> more pictures tomorrow. kelly, thank you. tomorrow, my colleague chuck todd will have much more on the

health care battle. independent senator bernie sanders and republican senator ron johnson. britain's parliament is investigating an apparent cyberattack targeting the e-mail accounts of it is members. a spokesperson tells nbc news they have blocked accounts from being accessed remotely as a precaution. the attack appears to be over and at this point it's not clear who might be behind it. also in london, people are being forced to leave their homes over safety concerns after that devastating fire at an apartment tower. tonight, lucy kafanov is in london talking to people who have been evacuated. >> reporter: ten days after the grenfell fire, a tragedy across britain. evacuation of apartments, hundreds of residents forced to leave their homes, dozens of buildings failing fire safety tests. manslaughter charges on the table as police investigate who should be held accountable

for the deadliest fire in decades. >> we have to leave. [000:07:58;00] that we've been living in a potential death trap for the last ten years. it is horrifying that this was able to happen. >> reporter: today, authorities announced that at least 34 high-rise buildings were covered in the same flammable materials blamed for the grenfell tower blaze. in that fire, a refrigerator on the fourth floor burst into flames causing the panels to melt in the heat allowing the fire to spread. fire safety specialists arnold tarling has been warning about the danger for years. >> buildings like tshi one which have been declared of being the same material are highly unsafe. you don't know from one day to the next whether there's going to be a fire. >> reporter: was the grenfell tower disaster preventible? >> yes, entirely preventible.

even if we have the cladding on the building that is preventible, the disaster would have been avoided having sprinklers in the building. >> reporter: the country is still grasping to come to grips with the disaster. 79 people lost their lives but the toll likely higher. prime minister theresa may determined not to let this happen again. >> the authority has the ability to do what is necessary to ensure that people have somewhere to stay and that the work is done so that those tower blocks become safe for them to return to in the future. >> reporter: but that's cold comfort for the hundreds of families left displayed tonight. lucy kafanov, nbc news, london. now to china where a massive landslide burned dozens of homes in a remote village. at least 140 people are missing after a side of a mountain gave way. jackie has that report tonight. >> reporter: torrential rains

pounded the mountain and water shearing off a side of a mountain. nearly 300 soil equivalent to 3,000 olympic pools covered a village. at least 140 people buried in the early-morning disaster. >> translator: the area is so large that the machinery could hardly go inside. >> reporter: more than 1,000 rescuers responded as the rains continue to come. chinese media reports they've recovered at least 15 bodies. this family of three, including their 1-month-old baby managed to escape after the baby woke them before the slide. >> translator: we heard a strange noise at the back of our house and it was a bit loud. when we came out, water flow washed us away instantly. >> reporter: officials say this is the biggest landslide to hit the region since

2008 when a 7.9 earthquake claimed nearly 90,000 lives in the same province. the reser all too familiar with digging through the rubble to search for the living and find the dead. janice mackey frayer, nbc news, beijing. california is now dealing with powerful swollen rivers. first responders say there could be a threat for weeks to come and they are warning people to stay out of the water. steve patterson has the story. >> reporter: from a distance, california's curran river looks inviting, even peaceful. but get a little closer -- >> are you hurt? stay where you're at. >> reporter: -- and you'll find a life and death battle being waged weekly. >> two feet. >> reporter: the fire department swiftwater rescue team is training double time. >> take my hand. jump right here. >> it's a nerve-racking feeling because you never know what can go wrong.

>> reporter: in just the last month, the department has received an unprecedented number of calls for help and they are not alone. 19 people have died statewide this year including this girl's brother ray. >> he was screaming for help and about 100 yards off he was not seen anymore. >> reporter: the danger starts at the top. massive snowpack in the sierra nevada mountains running into swollen rivers creating life-threatening conditions. from this point upstream, you can feel the full power of the water. it's snowmelt from the mountains and it's cold and nearly 40 degrees. what is letting people a good idea to getting into water like this? >> i think a lot of people think it can't happen to me and then they learn rather quickly that they are no match for the river. >> reporter: despite the warnings, people are still coming out to the river. >> it looks very fast and the current looks

pretty strong. we're not trying to go into the river at all. >> reporter: with this much power being first responders say it's not worth the risk. >> stay out. it's dangerous. you're putting yourself at risk along with the people that come to rescue you. >> reporter: steve patterson, nbc news, bakersfield, california. coming up, why some people are willing to contract a serious disease in an effort to live longer. and the $2 million hidden treasure that has people risking their lives to strike it rich. ♪ ♪ ♪ ♪

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fifteen minutes could save you fifteen percent or more. tonight, a new and daring clinical trial that could mean the difference between life and death for thousands of people waiting on the transplant list in the united states. dr. john torres has our report on a breakthrough medical advance and the surprising reason it's happening. >> reporter: today it's a celebration as just a year ago, she was suffering from serious kidney disease and on die alice. irma was up against a five-year wait on the transplant list. >> at some point i considered making a will.

>> reporter: and then a phone call with an outrageous proposal. >> i can give you a transpla you hepatitis to do it. >> reporter: this means that hepatitis infected kidney. >> it's not used in a patient and what happens to that kidney? >> it literally gets thrown in the garbage. if a kidney is an otherwise healthy kidney, it should be used to save someone's live. >> reporter: they launched a bold experiment. tell me about this. betting on a new medication to be the game-changer. there was no proof of this until irma and nine other pioneers took the risk. for irma, the risk was worth it. >> i will take a pill versus dialysis. it's no contest. >> reporter: all ten got the virus and were treated with one pill a day for 12 weeks.

today, all ten are healthy with functioning kidneys. >> your transplant is well. >> reporter: and now it's not just about kidneys. the team is starting the first trial to transplant hearts infected with hepatitis c. >> we want to use every high-quality hepatitis c infected organ there is. >> it's a milestone for me because i'm actually me again. >> reporter: one woman's brave decision opening up a new era of organ transplants. dr. john torres, nbc news, philadelphia. >> fascinating. up next, a shocking moment for some boaters as a giant humpback whale jumpsthis this this this is my body of proof. proof of less joint pain and clearer skin. this is my body of proof that i can take on psoriatic

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out of the water a few feet away from their boat. one of the men wrote on facebook, it was one life. you can tell he had to bleep some words out there. a $2 million treasure hidden by a famed art dealer has people scouring remote areas of the country in a quest to get rich but now the quest has turned deadly and that has some people calling for it to end. miguel almaguer has more from los angeles. >> reporter: in the beautiful rugged mountains in santa fe, new mexico found the body of a pastor after looking for a treasure hidden in these hills. >> people start to make decisions that aren't based in good, sound judgment when it comes to money. >> reporter: the mystery began seven years ago. >> come on. let's find the treasure. >> reporter: hundreds of thousands joining

the search. hikers looking for $2 million in gold coins. the only clues in a poem. give you title to the gold. >> reporter: this famed art collecter said he hid his wealth spreading words through his memoir, "thrill of the chase." but there is danger. last year, this hiker randy was found dead. >> i think this treasure hunt is ludicrous, out of control, dangerous and it should be stopped. >> reporter: while bilyeu was lost, they searched for the hiker. enthusiasts are dying to find his gold. the millionaire calls the deaths tragedies and says he's not made a decision whether to call off the hunt. >> the treasure is not hidden in a dangerous place. don't look for the treasure anyplace where an 80-year-old

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nearly 300 fatally. one program is working with survivors of gun violence and teaching them a fiery beautiful results. ron mott has the story. >> reporter: in chicago, they're fighting gunfire with fire. young faces victims of violence literally taking the heat. working hard on crafting new futures, an effort to break an often deadly cycle. project fire, it's called, glass making, mentoring, therapy, employment, life. >> for some of them, you know, when we first meet them, success is defined as, i didn't get killed today. brad, is trauma psychologist, co-founded this with an artist. >> most of the people we've worked with here come in with a very limited sense of what their future can hold and leave with a much broader range of options for themselves. >> reporter: this 20-year-old was shot

in 2015 and now through art he soon is headed for the famed corning glass in new >> it made we want to become a good person, be positive and show people there's good things in life and there's a better way of living. >> reporter: his pieces are starting to sell. one, a twisted gun he named anger rejected hauled in $300 at a recent new jersey show. 18-year-old donald jackson also a gunshot survivor. >> we are a victim of the same thing. he know what i'm coming from and i know what he coming from. >> reporter: why does something like this work? >> it's a collaborative medium. you can't really do this well alone so it creates relationships and connections. they know when they're here that they're safe. >> reporter: playing with fire safely. burning painful events of the past, healing spirits. ron mott, nbc news, chicago. that is "nbc nightly news" on a saturday. i'm kate snow reporting from new york.

join me again here tomorrow night. we'll take you behind the scenes for a look

goes into making all those emojis. for all of us here at nbc news, have a great night. ♪ [ cheers and applause ] students from baltimore, washington, and central virginia meet today on the "it's academic" intercity championship. hello everyone. i'm hillary howard and this is the exciting opening round. each team begins with 100 points. ten up for the right answer, ten down for the wrong answer.