>> rose: an ominous forecast for more scenes like this, surginged fromwaters and rising sea levels. not rising tonight the level of political discourse. >> total lightweight. >> the world's biggest jack ass. >> rose: disturbing new findings about the risk of dementia in women. and... ♪ amazing grace ♪ >> rose: how sweet the sound and now it's found on broadway. captioning sponsored by cbs this is the "cbs evening news" with scott pelley. >> rose: good evening. scott is off tonight. i'm charlie rose. we begin tonight with extreme weather around the country and a dire forecast about the climate in the years ahead. it has been another sweltering summer day in the deep south and the north east.

20 million people are under heat advisories. factor in the humidity and it felt like 111 in tallahassee florida, 102 in atlanta georgia, and 98 in the nation's capital. in the west the punishing drought appears to be giving way to devastating rain. ben tracy begins our coverage. >> reporter: today construction crews began fixing the highway bridge washed out by heavy weekend rains in california. scientists say such rare summer storms are a preview of a potentially record-breaking wet winter in the west. nasa climate scientist josh willis says the storms are fueled by the phenomenon called el nino. >> a whopper of an el nino could bring a lot of really heavy rain really quickly which brings as many problems as it does solutions. >> reporter: el nino is a band of warmer-than-usual water in the pacific ocean along the equator that changes weather patterns worldwide. forecasters say this one has the

potential to be the most powerful el nino on record. signs of el nino have been washing up on western shores, millions of red crabs carried north by warm water currents covered beaches and starving sea lion pups are being rescued because the fish they eat have fled to colder water. shawn johnson is a veterinarian at the marine mammal center. >> this warm water stretches all the way from baja up to alaska. >> reporter: four years of drought have led to massive wildfires, but el nino-fueled storms could simply give way to massive floods. could this be a case of be careful what you wish for? >> we absolutely have to be careful what we wish for. in southern california we're prone to floods. >> get out of here. >> reporter: a relatively small el nino in 2005 brought down a hillside, burying a neighborhood. the extreme 1997/1998 el nino caused more than $4 billion in damage and killed 189 people

nationwide. now, if this el nino continues to grow, we could see heavy rains here in california as early as next month lasting throughout the winter, and charlie, as one scientist put it: great droughts usually end in great floods. >> rose: thanks, ben. in the future there could be major flooding along every coast, so says a new study that warns the world's seas are rising. jim axelrod has that part of the story. >> reporter: ever-warming oceans melting polar ice could raise sea levels 15 feet the next 50 to 100 years. nasa's former climate chief now says, five times higher than previous predictions. >> this is the biggest threat that the planet faces. >> reporter: james hansen co-authored the new journal article raising that alarming scenario. >> if we get sea level rise of several meters, all costal cities become dysfunctional. >> reporter: if ocean levels rise just ten feet, look what

happens to miami seattle and new york city. just six feet of water would do this to fulton street in lower manhattan, this to harvard university in massachusetts, and this to galveston texas. the melting ice would cool ocean surfaces at the poles even more, while the overall climate continues to warm. the temperature difference would fuel even more volatile weather. >> as the atmosphere gets warmer and holds more water vapor that's going to drive stronger thunderstorms, stronger hurricanes stronger tornadoes because they all get their energy from the water vapor. >> reporter: nearly a decade ago, hansen told "60 minutes" we had ten years to get a handle on global warming. >> it will be a situation that is out of our control. >> reporter: we would reach a tipping point. >> we're essentially at the edge of that. that's why this year is a critical year. >> reporter: critical because of the united nations meeting in

paris in december designed to reach legally binding agreements on carbon emissions charlie those greenhouse gasses that create global warming. >> rose: thanks, jim. today the "des moines register" said the political waters are being polluted by donald trump. the paper called on him to drop out of the race for the republican presidential nomination. nancy cordes tells us the war of words between trump and its competitors escalated today. >> and then i watch this idiot lindsey graham on television today. >> reporter: the g.o.p. primary took on the air of a schoolyard spat today, donald trump unleashing a string of insults on south carolina senator graham graham in south carolina. >> a total lightweight. here's a guy in the private sector he couldn't get a job believe me. >> reporter: graham had attacked trump on cbs thursday morning. >> stop being a jackass. you don't have to run for president and be the world's biggest jackass. >> reporter: trump retaliated by giving out graham's cell

phone number. >> 202... >> reporter: and then unloaded on other republicans including texas senator rick perry who called him a cancer. >> he put glasses on so people will think he's smart. [laughter] it just doesn't work. >> reporter: in its scathing editorial, the "des moines register" called trump a blow hard and says he had coarsened our political dialogue and cheapened the electoral process. are you polluting the political race? >> i think we're doing so well. i think they understand that. >> reporter: he is doing well, leading his nearest g.o.p. rival by 11 points in the latest poll. here in bluffton, residents lined up two hours early to hear him speak. >> i like what he is saying. he's bringing things out. >> reporter: do you think he would be a good president? >> i don't think so. i don't think he has some of the qualities that would be good. >> reporter: ginger zeller is a retired nurse.

you think he's talking about the right things? >> yes, i do. >> reporter: trump says he's trying to be nicer but that his opponents keep provoking him as a way to generate publicity for themselves. senator graham for instance, didn't seem all this upset to find himself in trump's crosshairs joking, charlie that he is now in the market for a new cell phone. >> >> rose: the beat continues. thanks nancy. trump drowned out the entry of ohio governor john kasich into the race today. that brings the republican field to 16 with one more to come. on the other side, five candidates are running for the democratic nomination. an anti-abortion group accuses planned parenthood of selling tissue and organs from aborted fetuses for profit. that is illegal. today the group released a second video to back up its claims. jan crawford takes a look. >> tell me what you... >> reporter: the second video showed an undercover interview with planned parenthood official dr. mary gatter.

she talked about different abortion methed to preserve fetal tissue. >> how do you feel about using a different procedure? >> reporter: she says the clinics are not providing the tissue for medical researchers for a profit. >> we're not making money. >> reporter: but then she haggles over the price and jokes about buying an expensive sports car. >> i want a lamborghini. >> reporter: the first sting video released last week by the anti-abortion group center for medical progress featured similar comments by planned parenthood's senior medical director. it's illegal to sell fetal tissue for profit or to change an abortion procedure to better harvest organs. planned parenthood says it's legally providing the tissue to medical researchers and any fees are to cover costs. in a statement it calls the videos deceptively edited, but even if it's legal medical

ethicists like new york university's dr. arthur caplan question whether planned parenthood should be in the business of providing fetal tissue. >> you have to be sure that it's the patient or woman who is at the center of your concern and nothing else is diverting from that. supplying fetal tissue from the remains to third parties is diverting. i wouldn't do it. >> reporter: and this is not the end of it, charlie. congress is now investigating planned parenthood and the leader of the anti-abortion group behind those videos tells us it will be releasing up to ten more in the weeks to come. >> rose: thanks, jan. today the operators of a texas jail acknowledged violating state rules for guard training and monitoring of inmates. this follows the mysterious death of a woman in one of the cells. don dahler is following the story. >> reporter: this is warwick county jail cell 95, the place where authorities say 28-year-old sandra bland tied a plastic bag around her neck and

hanged herself using this privacy partition. her feet barely touching the ground. she was found three days after she was arrested following a routine traffic stop. bland originally from the chicago area, was stopped by texas trooper brian infinia for failing to signal a lane change. in this affidavit released today, the officer claims bland became combative and kicked him in his right leg. a witness captured parted of the arrest on his cell phone. >> you slammed me to the ground. do you in the care about that? i can't even hear. >> reporter: late yesterday the waller county sheriff released surveillance video of the hallway outside bland's cell as well as a time line. at 7:05 a.m., bland tells a deputy during a routine check "i'm fine." at 7:55 a.m., bland asks the deputy if she can make a phone call. at 8:58, a deputy found her the medical examiner has ruled her death a suicide "by self-inflicted asphyxiation." bland's sister sharon cooper

doesn't believe it. >> my sister was somebody who was full of life, who had so much to live for. that's why it's unfathomable based off of the person i know. >> reporter: the trooper has been placed on desk duty for violating procedures during the arrest. charlie, the district attorney says he will present all evidence in this case to a grand jury as early as next month. >> rose: thanks, don. today flags atop the white house and other federal buildings around the country were lowered to half-staff on orders from the president. it is to honor the five u.s. service members shot to death last thursday in chattanooga. there is a memorial service in marietta, georgia, this evening for marine lance corporal skip wells. scientists are trying to unlock the mysteries of alzheimer's disease, including why it affects so many more women than men. a new study out today finds older women with mild memory problems worsen about twice as rapidly as men. we asked dr. jon lapook to look in and tell us more.

>> i got it. >> reporter: allan and clare vann retired early from careers in education and in 2001 began the travel the world but in 2006 allan noticed some changes in his wife. >> clare had a built-in gps system. she never got us lost, but she started getting us lost when they would drop us off in a strange city. >> i forgot all about that. >> reporter: two years later at age 63, clare vann was diagnosed with alzheimer's disease. looking back, what was the decline like? >> she would fall off a cliff with a new symptom i hadn't seen before, then it was like "alice in wonderland." the just fell down that black hole, and since then the decline has come much more rapidly. >> reporter: clare is now in assisted living. >> we were just having fights constantly and we have had a fairy tale marriage, and it was just disintegrating in front of me. >> reporter: a new study from duke university medical center suggests women at risk for alzheimer's face a steeper decline than men.

researchers followed 4400 men and -- 400 men and women in their 70s with mild cognitive impairment and found women declined at twice the rate as men. >> we need to sit down today. >> reporter: roberta diaz brinton of the university of southern california studies how alzheimer's develops in the aging brain. >> we know that the disease process starts 20 years before diagnosis. and in our research, we have gone back in time to ask is there something that is specific to the female that could put her at risk. >> reporter: brinton is focusing on risk factors surrounding menopause including hormonal changes and insomnia. but most women never develop alzheimer's despite falling hormone levels so the answer is unlikely to be simple. >> rose: apple's stocks slipped sharply. uncertainty over the apple watch

prompted a sell-off. the company lost $62 billion in value in after-hours trading. still ahead, a battle for the streets between uber and the yellow cab companies and two princes with a special reason to smile when the "cbs evening news" continues. introducing the first ever gummy multivitamin from centrum. a complete, and tasty new way to support... your energy... immunity... and metabolism like never before. centrum multigummies.

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and may stop treatment. side effects may include diarrhea nausea, upper respiratory tract infection, and headache. tell your doctor about all the medicines you take and if you're pregnant or planning to be. ask your doctor about otezla today. otezla. show more of you. >> rose: many folks looking for a way to get around town have hailed the arrival of the uber option, but the company's efforts to expand are coming under fire from yellow cab companies, most recently here in new york city. and here's anthony mason. >> how you doing? >> i'm fine, sir. how are you? >> reporter: after six years of driving a taxi in new york, hasan mohammed switched to uber this year. what's the difference? >> it's like day and night difference. uber is totally a revolution. it's changed the whole industry. >> reporter: uber, the transportation network that allows passengers to connect

directly with drivers through an app, has become a favorite of business travelers a majority now prefer it to taxis. but uber has met opposition in cities everywhere, from cab drivers who say the service is underregulated. zanita rodriguez is a new york cabbie. >> i don't think it's fair that uber should be coming in here like that and just taking over. >> reporter: and from city governments who say the streets are more congested. in new york, mayor bill de blasio has proposed a cap on uber cars, which now outnumber yellow cabs. >> uber is there. >> reporter: uber has count werde massive ad blitz claiming it will cost 10,000 jobs. >> mayor de blasio is pushing the agenda of his big taxi donors. >> reporter: and it's getting ugly. >> uber is a multibillion dollar corporation, and they're acting like one. >> reporter: across the untry, uber's acceleration has been amazing from nearly zero drivers to more than 160,000 in less than two years.

are you making more money doing this? >> it's not about making more money. it's about my own freedom and all. >> reporter: hasan mohammed drives his own car and now sets his own schedule. and you like that? >> yeah, big time. >> reporter: you think this is a better system? >> this is a lot better system. it's the technology of tomorrow. >> reporter: and for drivers like mohammed, there's no turning back. anthony mason, cbs news, new york. >> rose: there is more tone way to stay cool during a heat wave. we'll have that when we come back. >> this portion of the "cbs evening news" is sponsored by trivago.com, the hotel search. hotel? trivago.

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nashville's songwriters' hall of fame. wayne carson died yesterday after a long illness. he was 72. an heir to the british throne turns two tomorrow. to celebrate the royal family put out this photo of george, the pampered prince of cambridge, with his father. it was taken at the christening this month of george's little sister princess charlotte. like much of this country, japan is having heat wave. it hit 93 in tokyo. what better way to cool off than a trip to the aquarium. the beluga whale is more than happy to spray the guests with water. they think they've been hit by a fire hose. a cop brings amazing grace to broadway. the he behind the hymn next. ♪ amazing grace how sweet the sound ♪ that saved a ♪ pport regularity

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lawmakers grill metro executives about safety on the rails. >> and a >> rose: we close tonight with a hymn, a great hymn, perhaps the most famous of all sung in churches for more than 200 years and now in a broadway theater. michelle miller graces us with the amazing story behind it. ♪ amazing grace ♪ >> rose: your musical is on a marquee on broadway. how does a small-town cop get that to happen? >> belief. >> reporter: christopher smith is the writer of "amazing grace." in 1997, he was a police officer who loved to read about history. >> i was wandering through a library and pulled a book off a shelf at random. >> reporter: that book was about john newtown a british slave trader in the 1700s. after years of selling slaves to america, newtown was himself held captive in west africa.

after his escape, he almost died at sea. >> he lived through a hurricane on a failing vessel, and it was during this dark night that he finally cries out and says, "god have mercy." that was the beginning of a great journey. >> reporter: a journey that led to a conversion. newtown became an abolitionist and wrote one of the most beloved hymns of all time. ♪ amazing grace ♪ ♪ how sweet the sound that saved a wretch like me ♪ i once was lost but now i'm found ♪

>> to hear the president of the united states sing that song, it just really validated for me that this was our time, that this was meant to be. ♪ i once was lost ♪ >> "amazing grace" is one of the only things we can agree on as a culture. it crosses age boundaries. it crosses time itself. and this man's story was the root of it. >> reporter: the story of a complicated man who gave the word a simple gift. ♪ now i see ♪ >> reporter: michelle miller, cbs news, new york. >> rose: a story so fitting for a great hymn. and that is the "cbs evening news" for tonight. for scott pelley, i'm charlie rose in new york. thank you for joining us. i'll see you first thing tomorrow on "cbs this morning." good night. ♪ ♪

♪ ♪

good evening. i'm lesli foster. >> and i'm derek mcginty. has metro done enough to keep its passengers safe on the trains? >> that was the question on lawmakers' minds just a short time ago as they questioned transit executives in a followup hearing, one of several congress has held about that smoke incident outside l'enfant plaza in january that left one person dead and more than 80 others injured. >> the house oversight committee just wrapped up a hearing a few minutes ago. members expected to hear from the driver of the train that was stuck in that smoke filled tunnel, but according to metro that driver curly james declined to testify, but despite that the questions and the statements came quickly and they got right to the heart of things. >> i think the