every state tonight. is this the unofficial start to the biden-trump rematch? and what some nikki haley voters are already saying tonight. will they go for trump? will they vote for bideen? our team is here. also tonight, the deadly explosion at an industrial facility outside detroit. the young man killed a quarter mile away, struck in the head by a flying canister. from new york city to boston, the new storms taking aim. tonight flood watches just posted from new york up through new england at this hour. what major cities will get hit with in the next 24 hours. the horrific plane crash in nashville. five people killed, including three children. the pilot reporting engine power failure, trying to land on interstate 40. tonight, the biden administration and this push for a cease-fire in gaza. but what hamas is now saying tonight. back in the u.s. in texas, the raging and deadly wildfires. now at least six fires burning. and tonight, we have learned a fire chief has died of a heart attack fighting these fires. tonight, there is news coming in, a suspected shark attack, an 11-year-old girl bitten while swimming. the remarkable discovery off the northeast coast tonight. a rare gray whale considered extinct in the atlantic. and where it's been spotted. and on this super tuesday, former first lady michelle obama weighing in now on that speculation that she would be willing to jump into the race for president if needed. >> announcer: from abc news world headquarters in new york, this is "world news tonight." with david muir. >> david: good evening. and it's great to have you with us here on this tuesday night. super tuesday across this country. the biggest day of voting until the november election. millions of americans in 15 states voting today. donald trump hoping to sweep every state, up against nikki haley hoping to soon pivot officially to the general election. tonight, the exit polls. with w. some intriguing findings already. one question, what will nikki haley supporters do come november? going into tonight, donald trump far ahead of his only remaining challenger, governor haley. he could come very close to clinching the nomination and barring some major surprises another big question of course how long will nikki haley stay in the race? look at the map tonight. on the republican side, voters in 15 states casting their ballots. tonight, 865 delegates up for grabs. 36% of the total delegates at stake in the entire republican primary. the polls now closed in nine states. we do have some results now coming in. abc news now projecting trump will win the virginia republican primary based on an analysis of the exit poll and the vote in so far. abc news also projecting trump will win the north carolina republican primary. abc news projecting trump will also win the oklahoma republican primary tonight. we're also projecting at this hour donald trump will win the tennessee republican primary. he will win the maine republican primary. that result just in tonight. we're also tracking vermont at this hour, where nikki haley is very close to donald trump there in the race. massachusetts, where there is also a very close race tonight in the republican primary between donald trump and nikki haley. we're getting our first look at what the voters are also saying in these exit polls. nikki haley supporters were asked how would they vote come november? this is preliminary exit poll data coming in from virginia, north carolina and california. haley supporters were asked in the presidential election this november will you vote for the republican nominee no matter who it is? in north carolina 81% of haley supporters said no. in california 69% said no. and in the key battleground of virginia 68% of nikki haley supporters said no, they would not vote for the republican nominee no matter who it is. that is a potential hurdle going forward for donald trump. we do have all this covered tonight beginning with rachel scott on the campaign trail for us. >> reporter: tonight from massachusetts to virginia, texas to california, millions of voters lining up to cast their ballots. donald trump hoping to nearly lock up the republican nomination with a super tuesday sweep. more than 850 delegates up for grabs. >> we want to send a signal that we're coming, this freight training coming. >> reporter: this could be the last stand for trump's last republican challenger, nikki haley. >> it is time for a new generational leader who can leave the negativity and the baggage behind. >> reporter: but today across the country, many republicans voters firmly in trump's camp. from retired teacher deborah pergerson in north carolina -- >> he's conservative. he was pro-life. and i think he did a whole lot for the country when he was president. >> reporter: to joseph hudson in tennessee -- >> trump is a very coarse individual, but at least he knows how to run the country. i think he'll make a strong president again, as long as he stays focused and does not become vengeful. >> reporter: still, in mobile, alabama, charles bolton, who has voted for trump before, is voting for haley this time. >> the guy scares me to death. he is so far off with his comments and his radicalism. >> reporter: president biden on the ballot in 15 states tonight, facing nominal opposition. still biden urging democrats to turn out as a show of strength to kick off the general election against trump. >> i guess the single most important message is that our democracy is at stake. literally our democracy. >> reporter: that message sinking in with william brinkert, a retiree from massachusetts. >> i think that the history of trump, the lawlessness he's exhibited, his threats of reprisal if elected i think are serious concerns. i think all of his actions, historically, undermine democracy. >> reporter: in alabama, social worker jessica rush anxious at the prospect of a trump return. >> unfortunately, the racist remarks he has made, the bigotry against women and a lot of people of color, so it -- i'm uncertain with him. he gives me anxiety. >> reporter: donald trump says he doesn't care if nikki haley stays in this race or drops out. he barely even mentions her when he campaigns lately. the former president now focused on the general election and that likely rematch with president biden, david. >> david: a real sign of where we're headed. rachel scott leading us off. former president trump as rachel said focused on president biden. president biden focused now on donald trump. so let's get right to our political director rick klein at the big board mary bruce with us as well and rick, the big question is if we are officially undergoing this rematch soon within the next couple of weeks given the numbers we're seeing so far tonight where do things stand between both of these candidates? >> look, if the general election starts now it is going to be a very tight race. this is the latest polling average from our partners at five thirty eight. in the key battleground states the seven states likely to determine the presidential election, and you can see that across these battlegrounds donald trump has an edge, sometimes a small edge, sometimes a bit of a bigger one and that's what makes tonight's results in all of these primaries so important. when you hone in on the places where nikki haley is doing very well, where her supporters are really dug in, those are the independent voters. those are much more likely to be voters that are up for grabs this fall, and if haley gets out of this race they are going to be the target of both trump and biden for the coming months. >> david: which is why it's so interesting, rick, that some of these nikki haley supporters said they're not going to automatically vote for trump come november. bring in mary bruce. because you have new reporting that president biden within the biden campaign has said he with need to go much more aggressively after donald trump. biden supporters out there looking at those battleground numbers where trump leads in every one of those states have got to wonder what is this campaign doing? >> the campaign really sees this as a pivotal point as the kickoff for the general election, and we have seen the president really ramping up his attacks against donald trump, taunting him as a loser. the president trying and relishing to get under trump's skin. and the campaign feels that voters really haven't registered yet that this is likely to be a trump-biden rematch, so they want to use this match to outline what is at stake, really crystallize the key differences between these two and of course, david, the president will have a big chance to do that later this week during his state of the union address. >> david: we're back on the air a short time from now. rick klein, mary bruce, our big thanks to both of you. the entire political powerhouse team will be right here with me for abc news live coverage of super tuesday. the races, the polling, where things stand in each of the battlegrounds as rick just showed us, biden versus trump if this election were held today what would we see. we'll break down the numbers pont v tonight. 10:00 p.m. eastern right here on abc. in the meantime we move on to the other news tonight and that deadly inferno outside of detroit. a warehouse of vaping supplies catching fire triggering deadly explosions injuring a firefighter and killing a young man a quarter of a mile away. abc's alex perez on the scene for us tonight. >> reporter: tonight, multiple investigations now underway after this massive building inferno triggered powerful explosions in the far suburbs of detroit, launching debris as far as two miles. a 19-year-old fatally struck in the head. >> we're receiving multiple calls. flames are above the roof. >> reporter: the blaze erupting just before 9:00 p.m. monday at a vaping supply business. enormous flames turning the night sky orange. thunderous booms heard for miles. >> my god. >> it sounded like bombs, like fireworks, but seeing that red in the air, we knew there was some kind of fire. >> reporter: hundreds of small blasts -- canisters of butane and nitrous oxide -- exploding, sending shrapnel in every direction. a firefighter suffering minor injuries after a canister crashed through his windshield. tonight, authorities say a 19-year-old, who was nearly a quarter of a mile away, was struck and killed by that flying debris. >> one of the projectiles did hit him, hit him in the head. and he did make it to the hospital alive. but he succumbed to his injuries. >> reporter: firefighters today working to extinguish the flareups. the smoldering building completely leveled, as investigators slowly sift through the rubble. tonight, authorities working to pinpoint what caused the fire. >> we know that they were not allowed to have these canisters. they were not permitted to have them in this building. they were illegally in that building. >> reporter: and david, you can see the aftermath behind me here. that's what's left of the building in the distance there. and if you look a little closer to me here, you can see all of the canisters still scattered in this parking lot. authorities say they have tested the air and water supply, and thankfully, both remain safe. david? >> david: all right, alex perez on the scene for us tonight. thank you, alex. next here this evening, from new york city to boston at this hour, new flood watches just posted, with yet another new storm taking aim at the northeast tonight and tomorrow. rain already across the northeast today. another system now out of the south, heading north at this hour. a difficult evening commute again tomorrow along i-95. a third system arriving for the weekend. heavy rain and flash flooding in new orleans. the pictures tonight. the storm now heading north, as well. senior meteorologist rob marciano timing it all out for us. hey, rob. >> reporter: hi, david. got about half an inch of rain today, that's kind of primed the pump for the bigger rain that's coming tomorrow. look where it is across the southeast. this one has a bit more of a tropical feed. so heavier rains in atlanta will ramp up tonight. the carolinas by 7:00 a.m. tomorrow. it's really going to be coming down pretty hard. riding up that front in the appalachians. that flood watch, you mentioned, new jersey, i-95, all the big towns in southern new england. look at the commute tomorrow afternoon. really coming down. ponding on the roadways. streams will be running high. we're going to see flooding here, all the way up through new england, as well. meanwhile, it's still a mess of a different kind in the west. more snow coming there. this one coming, though, thankfully, won't be measured in feet. we're going to get a lot of rain here tomorrow, though, david. >> david: rob marciano with us here tonight. thanks as always, rob. we turn now to the horrific plane crash in nashville. the pilot reporting engine power failure, unable to reach the airport, then crashing on interstate 40. five people were killed, including three children. here's gio benitez. >> reporter: tonight, chilling video capturing this single-engine airplane attempting to make an emergency landing in nashville monday night. but the plane crashing alongside interstate 40 and bursting into flames, killing all five people on board. moments earlier, the distressed pilot can be heard radioing air traffic control, saying his engine had shut down. >> my engine turned off. i'm at 1,600. i'm going to be landing -- i don't know where. >> reporter: the plane traveling from mount sterling, kentucky, outside lexington, to nashville. authorities say two adults and three children were on board. all canadian citizens. air traffic controllers clearing the runway at john c. tune airport for an emergency landing, but the pilot saying he's too far away. >> runway two, runway two. cleared to land. >> i'm too far away, i won't make it. >> reporter: the plane then crashing into this grassy median. first responders rushing to the scene. >> they were met with heavy flames and fire, smoke in the area showing from that crash site. >> reporter: today, the pieces of charred and twisted metal carefully moved for further analysis. >> we're going to basically put the airplane back together in a three dimension format on the floor of the hangar, which can help us determine what actually caused the failure of this engine. >> reporter: and david, investigators say they're also going to be looking into the pilot's history and the plane's maintenance records. they also want anyone with video of the crash to come forward. david? >> david: gio benitez with us tonight, as well. gio, thank you. next tonight here, jury selection is now under way for the father of the michigan school shooter who killed four classmates in 2021. james crumbley is charged with four counts of involuntary manslaughter for his son ethan's deadly attack. four weeks ago, his wife jennifer crumbley was found guilty on the same charges. the first parent to be convicted in connection with a child's mass shooting. she is set to be sentenced on april 9th. now to the race to negotiate a cease-fire between israel and hamas. with the holy month of ramadan less than a week away now. president biden increasing pressure for a cease-fire in gaza, but what hamas is now saying tonight. abc's tom soufi burridge from the region again tonight. >> reporter: tonight, time running out to reach a deal for a cease-fire in gaza, with president biden saying israel has made a, quote, rational offer and now it's down to hamas. >> the hostage deal is in the hands of hamas right now. >> reporter: today, hamas saying it will not accept an agreement without the "complete withdrawal" of israeli troops. israel refusing, instead offering a six-week cease-fire, with 40 hostages freed in return for the release of hundreds of palestinian prisoners. president biden warning of the potential for further violence if the war continues during ramadan, which begins at the end of this week. >> israel and jerusalem, it could be very, very dangerous. >> reporter: today, israel's prime minister hoping to dial down tensions, announcing they won't restrict the access of worshippers into the al aqsa mosque in jerusalem during the start of ramadan. today, more u.s. and jordanian airdrops -- 36,000 meals, this time into northern gaza, where the u.n. says hundreds of thousands of people are on the brink of famine. israel saying more aid trucks are getting in, insisting distributing the aid inside gaza is the real problem. even though people are potentially starving on the ground, you don't have the ability to get the aid to people quickly in a mass way? >> the u.n. needs to increase its capability of distributing the aid, so more aid can reach the different parts of the gaza strip. >> reporter: and david, president biden saying we'll know in a couple of days if a deal is going to happen. talks involving hamas are set to continue in cairo tomorrow. david? >> david: tom soufi burridge tonight. tom, thank you. this evening the philippines is accusing china of, quote, dangerous maneuvers in a disputed area of the south china sea. drone video from the philippines coast guard showing two chinese vessels using several water cannons on a small boat carrying supplies to philippine troops in the region there. the smaller boat colliding with one of the chinese vessels. china claims philippine ships have no right to be there. when we come back here tonight, the raging and deadly wildfires in texas. now at least six fires burning. the images tonight. also news coming in this evening about a suspected shark attack now, an 11-year-old girl bitten while swimming. and michelle obama tonight, on this talk that she might jump into the race for president, in a moment. when you have chronic kidney disease... ...there are places you'd like to be. like here. and here. not so much here. farxiga reduces the risk of kidney failure which can lead to dialysis. ♪far-xi-ga♪ farxiga can cause serious side effects, including ketoacidosis that may be fatal, dehydration, urinary tract or genital yeast infections, and low blood sugar. a rare, life-threatening bacterial infection in the skin of the perineum could occur. stop taking farxiga and call your doctor right away if you have symptoms of this infection, an allergic reaction, or ketoacidosis. when you have chronic kidney disease, it's time to ask your doctor for farxiga. because there are places you want to be. if you can't afford your medication, astrazeneca may be able to help. ♪far-xi-ga♪ nature's bounty hair growth. help grow thicker, fuller hair with just one capsule a day of advanced hair complex. conquer hair thinning... ...and fall in love with your hair all over again. only from nature's bounty. generalized myasthenia gravis made my life a lot harder. but the picture started changing when i started on vyvgart. ♪ vyvgart is for adults with generalized myasthenia gravis who are anti-achr antibody positive. in a clinical trial, vyvgart significantly improved most participants' ability to do daily activities when added to their current gmg treatment. ♪ most participants taking vyvgart also had less muscle weakness. and your vyvgart treatment schedule is designed just for you. in a clinical study, the most common side effects included urinary and respiratory tract infections, and headache. vyvgart may increase the risk of infection. tell your doctor if you have a history of infections or symptoms of an infection. vyvgart can cause allergic reactions. available as vyvgart for iv infusion and also as vyvgart hytrulo for subcutaneous injection. additional side effects for vyvgart hytrulo may include injection site reactions. talk to your neurologist about vyvgart. >> tonight, six large wildfires continue to burn across the texas panhandle. the smokehouse creek fire destroying roughly 1.1 million acres. flames burning down homes, killing livestock and crops. the fire chief in the hard-hit town of fritch dying of a heart attack while battling a structure fire today. former first lady michelle obama once again shutting down speculation about whether she would jump into the race for president if needed. the former first lady making it clear, as she has before, she supports president biden and vice president harris, and will not be running for president. her spokesperson says she's expected to act as a campaign surrogate for president biden and vice president harris. arizona senator kyrsten sinema has decided she will not seek re-election in arizona. in a high stakes battle with control of the senate at stake, the former democrat turned independent bowing out of a three-way race there. she trailed democrat ruben gallego and republican primary front-runner kari lake. when we come back here tonight, the suspected shark attack, an 11-year-old girl bitten. and then, the stunning sight right off the northeast coast tonight. what they think they have discovered. ke a porcelain doll. if you have postmenopausal osteoporosis and are at high risk for fracture, you can build new bone with evenity®. ask your doctor if you can do more than just slowing down bone loss with evenity®. want stronger bones? 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