cross-country weather threats. tens of millions in the path of a dangerous storm, from the midwest of the south, with so-called gorilla hail and tornadoes. plus, heavy snow in colorado leaves people stranded. >> i was crying all day yesterday because i wanted to be home. and i can't. >> norah: the "cbs evening news" starts now. ♪ ♪ good evening. i'm norah o'donnell, and thank you for being with us. we begin tonight with more than 40 million americans under threat from two major storm systems. heavy snow is falling across the rockies, with 3 feet already on the ground in parts of colorado, causing travel nightmares at the airports and on the roads. hundreds of flights at denver international airport were canceled today and more severe and dangerous weather is sweeping across the middle of the country today, with several tornadoes touching down in kentucky and indiana. this funnel cloud was spotted over a small town in kentucky. communities are surveying the aftermath with downed trees and severely-damaged homes and businesses. now that same system is moving east. with more than a dozen states under severe weather threats tonight from dallas to indianapolis, with thunderstorms, damaging hail, and more tornadoes in the forecast. cbs's dave malkoff will start us off tonight with more on these life-threatening storms. >> tornado on the ground. >> reporter: tonight, the severe weather threat keeps growing in the midwest with multiple tornadoes touching down in indiana. in hanover, a tornado rippedroofs to collapse, knocking down trees and power lines. >> total destruction. the inside. >> yeah. >> everything. >> reporter: in madison, another tornado crossed the ohio river. video shows debris spinning in the air. in milton, kentucky, at least 100 structures were damaged after a tornado touched down. >> it's on the ground! it's on the ground! it's on the ground! >> reporter: last night, a supercell thunderstorm spun up a tornado as severe weather moved alta vista, kansas. hail battered parts of northern kansas. some hail bigger than golf balls. in colorado, record-breaking snowfall was the problem. last night, some parts of the state have gotten 20, 30 inches of snow. now, try digging out of all of this. especially if you rarely see snow like this. hazardous winter conditions created a nightmare in colorado springs, leaving some drivers trapped. people stuck on highways like i-70 causing a standstill, leading to major closures west of denver. >> i came here to ski. >> our flight got canceled. we rented a car, came up here, tried to get to steamboat, but unfortunately the blizzard set us in, and we were lucky enough to get a place to stay here. >> reporter: the snow also causing more than 800 flight cancellations at denver international airport. >> i was crying all day yesterday because i wanted to be home. and i can't. >> reporter: at this blustery exit in golden, colorado, there are hundreds of people from all over the country who are just simply stuck here. and norah, all of this snow, every single last flake of it, has fallen since 10:00 p.m. last night. >> norah: wow. dave malkoff, thank you so much. for a look now at where this severe weather is headed next, let's bring in meteorologist chris warren from our partners at the weather channel. good evening, chris. >> good evening, norah. as dave just showed us, it is still snowing in colorado, and with this lingering system still a couple more feet of snow is possible in the higher elevations. the big threat, though, we are tracking tonight is a severe weather threat that has been picking up. very large hail and tornadoes possible, with a damaging wind threat also going through the overnight hours, as tomorrow the threat shifts now to the south. we will watch these storms roll through during the daylight hours, and then into the evening dropping to the south, the storms are now starting to pick up, in texas going into the overnight hours. this front is also going to bring some heavy rain that is going to stall out with, norah, the potential for some flash flooding going right into the weekend. >> norah: chris warren, thank you. there is breaking news from michigan where a jury has just reached a verdict in the trial of james crumbley whose son killed four students in a school shooting. let's get to cbs's andre gutierrez. >> guilty of involuntary manslaughter. >> reporter: the jury deliberated for only ten hours before finding crumbley guilty of all four counts of involuntary manslaughter. >> we have made our decision. >> reporter: crumbley is the father of high school shooter ethan crumbley who killed four classmates in 2021, last month his wife was convicted for the same charges of her role in the mass shooting. saying james crumbley could have prevented the attck, saying he failed to properly secure the gun for his son and did not tell school officials he had access to one when alerted of his troubling behavior in school. prosecutors also accused crumbley of not getting his son the mental help he needed. on tuesday, jurors were shown the chilling journal entries ethan crumbley wrote before the massacre saying "i have access to the gun and ammo, i'm fully committed to this. going to prison for life that many people have about one day to live." killed in the attack was madisyn baldwin, tate myre, hana st. juliana, and justin shilling the second verdict in a pair of historic cases. >> i would like to thank the mothers and fathers standing to the right and left of me. it has taken unwavering courage, i will forever remain in awe of their strength and perseverance that they have shown in the last two and half years. this verdict does not bring back their children, but it does mark a moment of accountability. >> reporter: andres gutierrez, cbs news pontiac, michigan. >> norah: now to a political rebuke causing shock waves from washington to tel aviv. the top democrat in the senate and the highest-ranking jewish elected official is slamming israel's prime minister, calling for new elections to replace benjamin netanyahu. cbs's scott macfarlane reports senator chuck schumer is now facing backlash, some backlash following this senate floor speech. >> reporter: nearly half a year into the war between israel and hamas... majority leader chuck schumer, one of congress' staunchest supporters of israel, uncorked a blistering criticism of the israeli leader. >> prime minister netanyahu has lost his way. >> reporter: in a 40-minute address on the senate floor, schumer called for new elections and new israeli leadership. >> he has been too willing to tolerate the civilian toll in gaza. which is pushing support for israel worldwide to historic lows. >> reporter: schumer's words come amid growing concerns among democrats and potential democratic voters about israel's aggressive military response to the october 7th attack by hamas. and netanyahu's resistance to let more humanitarian aid into gaza. more than 31,000 palestinians have died, and gaza is on the brink of famine. president biden has voiced his own frustration with netanyahu, but has never called to replace him. white house officials, who knew in advance what schumer would say, have expressed deep concern about israel's plans to conduct a ground invasion of the crowded city of rafah. israel's ambassador to the u.s. called schumer's comments unhelpful and said israel is a sovereign democracy. >> this is not only highly inappropriate, it's just plain wrong. >> reporter: while congressional republicans blasted schumer for undercutting a u.s. ally. >> it is grotesque. and hypocritical. for americans who hyperventilate about foreign interference in our own democracy to call for the removal of a democratically-elected leader of israel. >> reporter: tonight, there is still uncertainty about the fate of hostages being held in gaza, including five americans. prime minister netanyahu has rejected the latest cease-fire proposal from hamas, arguing it's based on unrealistic demands. norah? >> norah: scott macfarlane, thank you very much. vice president kamala harris today became the first sitting vice president or president to visit an abortion clinic. the biden campaign hopes that by putting reproductive rights front and center this election cycle, it will motivate voters to go to the polls. cbs's nancy cordes reports tonight from minnesota. >> the reporter said, you have made history, i guess again, because, you know, i did. [laughter and applause] >> reporter: the vice president made history with a half-hour private tour of an unassuming spot: a planned parenthood clinic in st. paul. >> the reason i am here is because this is a health care crisis. >> reporter: the clinic has seen a 25% surge in abortions since two neighboring states, along with several others, enacted full abortion bans. >> and doctor, please. >> reporter: dr. sarah traxler is the chief medical officer. >> our new abortion landscape i. it is dangerous. and it is putting my patients and health care providers at severe risk. >> reporter: the visit was the last stop for the vp in a six-state swing that has been solely focused on reproductive rights. >> these extremists, they are trying to take women back to the 1800s. >> we must restore the protections of roe. >> reporter: the issue is a top focus for the biden campaign, and here's why: 57% of americans say the overturning of roe v. wade nearly two years ago was mostly bad for the country. minnesota governor tim walz. is this the most aimating issue for democrats in your state right now? >> well, it's one of them. i think people are passionate. we are a passionate people. we vote in very high numbers. but i think at the end of the day, it is the one that is most personal and feels the most threatening, and it's the one that's real. >> reporter: donald trump, who attended a hearing in his classified documents case today, has strategically declined to say if he backs the 15-week national abortion ban favored by some republicans. >> you have to win elections. otherwise, you are going to be back where you were, and you can't let that ever happen again. >> reporter: we got some legal news today, in another one of the four criminal cases that trump is currently facing. the manhattan d.a. offered a 30-day delay in a trial that was supposed to get under way in just a couple of weeks. now this is the case that has to do with hush money payments that were allegedly made to adult film star stormy daniels. the defense wants 90 days to review tens of thousands of pages of new documents that were just handed over to them. norah? >> norah: nancy cordes, thank you for that update. tonight, a number of new developments in what's being called the biggest cybersecurity attack on america's health care system. the department of health and human services is now investigating unitedhealth group after hackers shut down the company's payment processing arm. three weeks later, the pharmacy network is now back online, but many providers are still struggling. cbs's nicole sganga reports. >> reporter: a ransomware attack turned national crisis. >> it's been one of the most stressful things we've gone through as a practice. and that's saying something, given that we survived covid. >> reporter: and for doctors like christine meyer, a personal nightmare. on an average weekday, you would get? >> $20,000, $30,000, $40,000, $50,000 in deposits. >> reporter: and today you got? >> $77,000. >> reporter: the hacked targeted change healthcare, a unit of united health, forcing the nation's largest medical payment system off-line on february 21st, leaving hospitals and medical practices in a cash crunch. >> so to find ourselves suddenly, you know, looking at our home and its value, can we afford to put it up to pay our employees -- it's a terrible feeling. >> reporter: white house officials cracking down on united health tuesday. hhs secretay xavier becerra demanding the company front hospitals and doctors more emergency funds. how are you holding them accountable? >> we will not continue to work with a clearinghouse exchange operation if it can't provide the payment for the services that our patients need. >> reporter: dr. meyer stresses it is not just a payroll problem. it's a patient problem. >> i'm most worried about having to reduce our hours. our patients that can't come here for their routine things, their sore throats, their cough, their blood pressure checks, where are they going to go? >> reporter: potentially landing patients in emergency roms. what is preventing another ransomware incident like this from happening tomorrow? >> everyone should be asking themselves, what's the answer to the question? what do i need to do to make sure i am not the next target? and what do i need to do to make sure that if i am a target, i don't bring a whole bunch of folks down with me over that cliff? >> reporter: concerns about a potential patient data breach have also prompted at least six class action lawsuits. unitedhealth group said in a statement that it's committed to providing relief to patients and practices affected. norah? >> norah: this is a big deal. nicole sganga, thank you so much. well, tonight, tiktok is fighting back after the house passed a bill calling for it to be banned in the u.s. unless it cuts ties with china. the senate is now reviewing the legislation. cbs's jo ling kent takes a look at what's next for the world's most popular app. >> this is not what we want. >> are you kidding me? >> reporter: the fight over the future of tiktok is bringing out angry users and a determined ceo. today on capitol hill, tiktok ceo held private meetings and made a public plea. >> i haven't heard exactly what. this is a ban on the app in this country that's going to impact 170 million americans who use the app. >> reporter: he is personally attending to stop a possible ban after the house passed a bill on wednesday that would mandate tiktok separate from its chinese parent company. it would have to sell to a u.s. buyer to avoid a ban. today, former treasury secretary in the trump administration steven mnuchin said he wants to buy it. >> i understand the technology. it's a great business. and i'm going to put together a group to buy tiktok. >> you're trying to buy tiktok? >> i am. because it should be on by a u.s. -- u.s. businesses. >> reporter: but that may not even be possible. >> let's say all of these things come together and a sale is poised. the chinese government could very well stop it. it's unclear if the algorithm, you know, is something that could even be exported to another country. >> reporter: if tiktok is banned? >> the way it would work is the app just wouldn't be updated. it would be removed from stores. and it would degrade over time. >> this is not just an attack on freedom of speech. this is an attack on small businesses. >> reporter: meanwhile, the company's ceo is weighing every option. >> we will continue to do all we can, including exercising our legal rights to protect this amazing platform that we have built with you. >> norah: and jo ling kent joins us now. there's so much to talk about. i mean, this is so unprecedented. so what do you think happens now? >> reporter: norah, it is up to majority leader schumer to schedule a senate vote. and if the bill passes, president biden says he will sign it. and then, if china is willing to sell, it could be the equivalent of selling starbucks or lockheed martin or shopify. tiktok is reportedly currently valued at about $100 billion, norah. >> norah: just incredible. jo ling kent, thank you for this. a 14-year-old girl is nearly kidnapped on her way home from school. why police are praising what she did. that's next. re praising what she did. that's next. when you can... du more with less asthma. it starts with dupixent. dupixent is not for sudden breathing problems. it's an add-on treatment for specific types of moderate-to-severe asthma. and can help improve lung function for better breathing in as little as two weeks. dupixent helps prevent asthma attacks... and can even reduce or eliminate oral steroids. can you picture it? 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