♪ ♪ captioning sponsored by cbs >> ninan: twister terror. tornadoes tear a path of destruction across the central u.s. danger from downed trees and power lines, many homes now reduced to rubble. so where is this latest round of severe weather headed next? on the trail, joe biden officially kicks off his presidential campaign in the swing state of pennsylvania. >> the single most important thing we have to accomplish is defeat donald trump. ( cheers and applause ) >> ninan: his message to voters with less than 18 months until election day. braveheart-- a football coach's act of heroism. how he stopped what could have been another school shooting

tragedy. and great scott-- meet the large "e" tyrannosaurus rex ever to walk the planet. good evening, i'm reena ninan. parts of the nation's midsection are devastated tonight. there have been nearly 50 reports of tornadoes in just the last 24 hours. homes and businesses have been destroyed, and tonight, hundreds of thousands remain without power. we begin in texas, with omar villafranco. >> reporter: powerful thunderstorms and tornadoes continue to pound the country's midsection from texas to missouri and nebraska. storm chasers in kansas captured the moment a tornado touched down and flipped a big rig. >> it knock a semi over in the road! >> reporter: the truck driver survived. the same tornado obliterated a home, its occupants lucky to be alive. chasers narrowly avoided getting sucked into the storm after getting dangerously close to

another tornado in kansas. the storm damaged their car. that same storm slashed through this house in minola. cleanup is already under way after the roof and brick walls were sheered off the home, scattering debris over several yards. this massive twister touched down in mccook county, nebraska. in the west texas town of abilene, a powerful storm briefly touched down in this neighborhood, damaging some homes, snapping trees, and breaking car windows. there were no reports of serious injuries. the storm is expected to drop several inches of rain here in texas. and with many rivers and lakes, like this one behind me, already saturated, people downstream are bracing for possible flooding. rina. >> ninan: omar, thank you. more than 28 million people are in the path of severe weather tonight. meteorologist jeff berardelli

joins us now tracking these storms. >> good evening, rina, and good evening, everybody. so we have two separate systems, one of them tonight and tomorrow, and then another stronger system as we move into monday and again on tuesday. so this is the area outlined in orange where we have the worst threat tonight, places like little rock, all the way down to tyler and brian, texas. on a scale of 1-5, it's about a 3, so right in the middle of the road there. mainly hail and wind, possibility of islealated tornadoes. kind of a similar story tomorrow but it's a little more disbursed across the ohio valley into the great lakes and sneft. again, wind and hail the main threat. but as we turn our attention to monday, the main threats are tornadoes and some of them could be on the very strong side, especially just to the north and west of oklahoma city, from chilledres, which is in texas, all the way up to around wichita, kansas. let's take it hour by hour as we head through the evening and overnight tonight. we have see the solid line of showers and thunderstorms around little rock and st. louis.

that moves into the ohio valley and great lakes tomorrow. it's a little more scattered tomorrow but still the possibility of a few strong or severe thunderstorms. then as we turn our attention to monday morning, that's whe things start to get going in the western part of the texas, around amarillo, and during the day that progresses towards the east, especially to the north and west of oklahoma city right around wichita. and this area in the line of tornadoes. big dip in the jet stream right there. strong upper level low in the west with cold air in the upper atmosphere, combining forces with a southeast wind right off the gulf of mexico, dragging moisture in. with that southeast wind at the surface and southwest wind aloft, these storms will twist and turn, and we may see some strong tornadoes,s especially on the northwest side of oklahoma city as we head into monday. >> ninan: remarkable how many states are affected. >> this is a big outbreak. >> ninan: joe biden picked

kicked off his first official campaign rally today in philadelphia. the former vice president energized his base by taking aim at president trump. weijia jiang reports from washington. >> the reason we're here is because, in a literal sense, this is the birth place of our democracy. >> reporter: there's another reason former joe biden is setting up shop in philadelphia, where he held his first campaign rally today. voters in the heavily democratic city could make all the difference in determining who wins pennsylvania in 2020, a precious battleground state that helped propel president trump to victory. >> i know how to make government work. ( applause ) not-- not because i talked or tweeted about it, but because i've done it. >> reporter: a new poll shows biden leading the pack of democrats in pennsylvania with the president trailing several of them, including biden 53-42%. senators bernie sanders and elizabeth warren also topped

mr. trump. >> pocahontas, that's another beauty. she's doing really well so far, isn't she? >> reporter: warren is just one of president trump's many targets. >> the worst mayor in the united states is now running for president. >> reporter: he bashed new york city mayor bill de blasio, who became the 24th democrat to enter the presidential race, a near record. the president often attacks biden, too, who he calls "sleepy" and "creepy." since announcing his bid, the former vice president has focused on mr. trump. >> the single most important thing we have to accomplish is defeat donald trump. ( cheering ) >> reporter: president trump is planning to hold a campaign rally in pennsylvania on monday mp he will likely remind supporters there they made a tremendous difference in 2016 when many voters helped change democratic strongholds red. rina. >> ninan: weijia jiang at the white house. the third round of this year's

p.g.a. championship teed off today without tiger woods. he failed to make the cut with a disappointing showg. he was coming off a victory lap from his own masters win last month. it was his first major championship since 2008 and the 15th of his career. cbs sports has you covered with televised coverage throughout the p.g.a. championship right here on your cbs station. this week added to the growing number of states that have passed restrictions on abortion. the expectation is the case will eventually come before the nuclear conservative supreme court court. here's kenneth craig. >> i'm here to tell you our freedom cannot be bought with the blood of our children. >> we may as well be the ones tying her hands to the bedpost and forcing her into child birth. >> reporter: the heated debate over abortion, this time in missouri, brought some to tears as lawmakers overwhelmingly passed the country's latest abortion pan.

>> proabortion rights protesters quickly called on governor mike parson to veto the measure, but he has vowed to sign it. >> we have the opportunity to be one of the strongest prolife states in the country. ( applause ) >> reporter: missouri's hb-126 is one of the so-called heartbeat bills, banning abortions after a fetal heartbeat can be deducted, around eight weeks. doctors could face up to 15 years in prison for performing an abortion after that time period, and the bill does not provide exceptions for rape or incest. >> this gives more rights to the rapists than it does to the mother. this law is barbaric. >> reporter: the move in the republican-controlled state comes in the same week that alabama bassedly a near-total ban on abortion, the strictest in the nation. so far this year, eight states have passed bills to limit the procedure. the laws have not taken effect

and are sure to face lenghi court battles. antiabortion rights opponents hope one of these cases will eventually reach the conservative-leaning supreme court, creating a potential path to overturn "roes have v wade." the attention around this polarizing debate is shifting to louisiana, which is one vote away from passing its own heartbeat law. the state's governor, who is an antiabortion rights democrat says he will sign that ban when it reaches his desk, rina. >> ninan: a lot to watch on this one. this year's marjorie stone man douglas high school year book features some unexpected friends. the furry faces of more than a dozen therapy dogs that have kept the community country since the school reopened following last year's mass shooting. coming up nj the heroic action that prevented what could have been been a school shooting

massacre. plus what we're learning about the life of .

>> ninan: a high school high scl football coach in oregon is being hailed a hero tonight. students, parents, and law enforcement say the coach prevented what could have been a tragic turn of events. here's carter evans. >> there's an active shooter at the school. >> reporter: it's an all-too-familiar scene, whether a gunman bursts into a classroom. >> nobody was really prepared for this. >> it was terrifying. it was truly terrifying. >> none of us knew if we were going to make it out alive. >> reporter: but at parkrose high school, in portland on friday no one was shot. the alleged gunman was tackled and held as police arrived. >arrived. and keanon lowe, the school's football and track coach, is

being hailed as a hero. >> he really cares about us, so, i'm not surprised. >> he's a great guy, and he always makes us do our best. but i believe that he's doing what he had to do. >> reporter: lowe played four years at the university of oregon. to his former teammates, now in the n.f.l., praised powered in quickly. his students definitely agree. >> this makes me look up to him even more because, i mean, seeing that a person like him would go out of his way to do something like that for a person-- for all of the students at parkrose makes me feel like i'm in a safe environment. >> reporter: the alleged shooter was a student at school. the parkrose high senior promised life was back to normal because of the coach. >> ninan: up next, murder mystery. why would there be so many suspect inside a popular teacher's desk? .

>> ninan: it's been more than a year since rachael deltondo, a well-liked 33-year-old teacher in pennsylvania, was gunned down in the driveway of her parents' home. rumors of corruption. but now, many are blame the lack of an arrest in this case on an underfunded and understaffed police department. "48 hours" erin moriarty reports. >> reporter: just over a year ago, on mother's day, 2018, 33-year-old rachael deltondo was shot several times at close range just outside her home. her father, joe deltondoo, was asleep by the side door when he heard the shots. >> i miss her walking in that door. she was our life. she was our life.

>> reporter: rachel's death is the ninth unsolved murder in the city of alquippa, pennsylvania. although there appear to be plenty of avenues for police to investigate, starting with 21-year-old sheldon jeter. rachel's mother, lisa. >> he was obsessed with her. he told me he's in love with her upon. >> reporter: sheldon jeter's attorney, michael santicola. >> i think it's fair to say that he's a suspect but there is a cast of characters that all could be considered suspects. i would say her fiance is a possible suspect. >> i'm the exfiangsta of rachael deltondo. >> reporter: frank, i'm going to ask you directly, duff anything to do with the death of rachael deltondo? >> absolutely not. >> reporter: >> she was afraid of police,

deathly afraid of police. >> reporter: joe perciavalle was assistant chief of police when rachel was murdered. do you think that anyone in the police department was involved in any way in rachel's death? >> ninan: you can watch erin moriarty's full report about the murder of rachael deltondo on an all-new "48 hours" tonight at 10:00, 9:00 central. still ahead, trouble in paradise. how a california town that nearly burned to the ground faces a threat from its own water supply. .

>> ninan: fire investigators say power lines caused one of the worst wildfires in california history. the campfire destroyed much of the town of paradise. but a different type of threat is now affecting plans to rebuild. here's jonathan vigliotti.

>> reporter: when jessica distefano and her family moved into their dream home last summer, they never imagined this would be their reality. 19,000 buildings were reduced to ash in the campfire. melted metal, plastic, and wood creating this toxic mix that officials say six months later have contaminated the town of paradise's water pipes. they've tested positive for elevated levels will of cancer-causing benzene. >> if my kids get cancer in 20 years, i'll never forgive myself. >> reporter: the irrigation district sails the pipes were contaminated either by melted water meters or toxic air from the fire that was sucked into the system. >> we've tested about 500 service lines in our district at this point, and about 30% of them have come up with contamination. >> reporter: paradise irrigation district manager kevin phillips and his team are testing the water along 173 miles of pipeline to find out which sections need to be replaced. that alone could take two years. for now, the water is unusable.

>> the process we're facing is monumental. it's something that there's no game plan that's been written for it. >> it's definitely been difficult to have a standing home in paradise right now. at times i wish that it was gone. >> reporter: massive water tanks are their life line for cooking and bathing. how much is this costing you and your family? >> it's about $250 every three to four weeks. >> reporter: and their insurance company, farmers, says it will soon stop reimbursing them for those fill-ups. >> and they said we would get one more fill-up and we're done. we tell our girls no more baths. try to do two-minute showers. >> reporter: jesse and martin thompson, whose home was the only one on their street to survive the fire, also rely on their water tank. >> we don't want to take chance with our babies. for us it was really big peace of mind. we wanted some security. >> reporter: securing safe water is also key for paradise business and schools that hope to eventually reopen.

there were about 1200 business in town before the fire. so far, about 10% have reopened, including two coffee shops and one restaurant. >> we are an essential service in an essential part of the town to rebuild. and we take that very seriously. >> reporter: while cleanup crews around town are a welcome sign, homeowners know fixing the water system is crucial to rebuilding their community. >> if we can't have clean water, then we can't have a town. >> as long as it takes, as long as it takes. >> we look at what has tore this town apart. but then we have to look on the positive side. we're working on our comeback story. >> reporter: jonathan vigliotti, paradise, california. >> ninan: am canning up, a jurassic discovery more than 60 million years in the making. we'll introduce you to scotty next. >> ninan: and finally tonight,

a glimpse at the largest tyrannosaurus rex ever to roam the earth. it's on display at a museum in canada. here's jamie yuccas. >> reporter: scotty roamed the earth some 67 million years ago. this massive beast of the mess soic era was discovered here in the frenchman river valley in canada. at that time, it was a flood plain with lush vegetation. >> it's just huge. >> reporter: wes long helped reconstruct scotty after spending a decade digging the

towering t-rex out of hard sandstone. >> you would be zipping away with your air hammer and all of a sudden a piece of rock would fly off and there's, like, a beautiful tooth there. >> he showed us some of scotty's actual bones and the t-rex discovery center. >> you can still see the serration ogz the side of the teeth. >> reporter: this is so sharp. i feel like if i hit it hard, i could almost cut myself. >> yeah. there are fossils with animals if you touch it the wrong way, >>o this is just one backbone. >> yeah. >> reporter: can i hold it. >> you can just-- you'll notice there's a weight to it. >> reporter: there is definitely a weapt to it. scientists found they had about 65% of the skeleton intact, including the skull, the lower jaw, vertebrae from the neck, back, and tail, and parts of the himself, leg, and shoulder. >> scotty lived a hard-knock life. >> reporter: scott persons is the paleontologist who led the study of this remarkable find.

he said the bones reveal much about scotty's life. >> it's got evidence of a broken jaw, of an impacted tooth. it's got a section of its tail where the vertebrae seem to have been compreltsed, possibly from the bite of another tyrannosaurus. >> reporter: hollywood has long had a fascination with the king of the carnivores. at 42 feet long, this tyrannosaurus rex was the size of a city bus, weighed nearly 20,000 pounds, and lived for 30 years, the largest and oldest t-rex ever to be found. >> dinosaurs are nature. theatre animal kingdom on the grandest scale. >> reporter: scotty is making its public debut, and when you have the biggest, baddest dinosaur on the planet, it's likely dyno-mania will not be far behind. jamie yuccas, cbs news, regina, canada. >> ninan: and you can meantime scotty at canada's royal saskatchewan museum. that's the cbs weekend news for this saturday.

i'm reena ninan in new york. good live from the cbs bay area studios, this is kpix 5 news. now at 6:00, we are on storm watch as a around the winner like rain makes our doppler look a bit like a time machine. the 108 beta breakers will start here tomorrow morning and rain is in the forecast. we will tell you how the rain might affect the 12 k race. obviously i don't agree with the statement that was made. it was deeply disappointing to me. >> a hot button housing bill left in limbo. opposition from housing advocates. a disturbing find and a bay area starbucks. a check of a rare restaurant air freshener reveals a hidden camera and no one knows how long it has been there. >> we began on storm watch

taking a live look at our cameras positioned all over the bay area. you can see it looks nothing like a typical day in may with steady rain in some areas and thick fog in other players. the rain sports cal state to cancel the commencement exercises at the concord campus. graduates will be invited to attend the ceremony at the hayward campus if it is not rained out as well. may showers sports uc berkeley to bend it umbrella band for today ceremony at memorial stadium. graduates came with ponchos to keep their gowns and tassels dry. speakers had the best deal. they were shielded under a tent. the latest on doppler is showing a band of showers and thundershowers moving through the bay area right now.

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