tonight, the gas explosion. the search for the missing today. first, the natural gas fears, then the sudden blast. more than 60 people and their split-second escape. we're on the scene. and we have seen several of these explosions in recent months. donald trump and his tough new words on undocumented immigrants and their children born here. are they really u.s. citizens? two giant sinkholes tonight. the earth opening, right where a home was swallowed before. the homeowner never found. new aerials coming in tonight. and a major interstate, shut down, too. extreme weather tonight. after multiple tornadoes, baseball fans running for cover. travelers trapped. millions now in the path tonight. and, who wants to be a millionaire? $4.5 million, found in just two feet of water off a popular american beach. is there more sitting right there tonight?

good evening. we begin tonight with a fear so many homeowners have, smelling gas in their home. fearing a potentially explosive leak. and a massive explosion and fire. more than 60 guests had just been warned to get out. making it out alive. the blast knocking people over. critically injuring one tonight. firefighters searching for two people, and late word that they're safe. but the explosion, the latest in a series of warnings tonight. neal karlinsky has the story.

>> reporter: the search for the missing went on much of the day. the blast so powerful, firefighters who'd just arrived at this motel 6 were blown back 20 feet, giving one of them a concussion. >> i have an explosion. looks li the east side of motel 6 just exploded. >> reporter: a 16-room chunk of the motel was torn off. >> i'm glad you're okay. >> reporter: witnesses say the only reason dozens weren't killed is because motel clerk tonya hinds smelled gas and got everyone out. you did not hesitate? >> no, i didn't. i was told this many years ago and it was in my head, when in doubt, get out. and i was in doubt. >> reporter: a gas company worker who responded to tonya's call to 911 was critically injured. emergency crews painstakingly sifted through the rubble for possible victims. 65 guests were here but tonight no bodies were found inside. from this new jersey home -- -- to city buildings. even an entire neighborhood near san francisco in 2010, natural gas lines have been the source of major explosions before. there are nearly 2.5 million miles of pipes delivering natural gas to our homes through occasionally weak

infrastructure. tonight, investigators say it appears a damaged gas meter caused the blast. one thing is clear, it could have been much worse if not for the motel clerk getting everyone out. and donald trump on immigration tonight. making it clear he believes all 11 million undocumented immigrants should be deported. all of this, as a new poll shows trump is closing in on hillary clinton in a head-to-head matchup. tom llamas has this story. >> reporter: tonight, donald trump riding high. his plan for mass deportation of undocumented immigrants now a flashpoint in this race. we asked him how he would make it happen. how would you deport the 11 million undocumented immigrants? how would you find them and

deport them? >> it is going to be be very easy. you just watch. >> reporter: how would you do it? can you give any specifics? trump now taking it even further, suggesting he will now explore whether courts could revoke the citizenship of american-born children of undocumented immigrants, which is guaranteed by the 14th amendment. >> do you envision federal police kicking in the doors and barrios around the country dragging families out and putting them on a bus? do you envision that? >> i don't think they have american citizenship. and if you speak to some very good lawyers, and i know some would disagree. but ny agree with me. you will find they do not have american citizenship. >> reporter: some of trump's opponents now signaling he is taking the party in the wrong direction. >> we ought to fix the problem rather than take away rights that are constitutionally endowed. >> reporter: would you end birthright citizenship? >> i would not. >> reporter: and hillary clinton pulling no punches. >> the idea that the united states of america would round up 11 or 12 million people and

deport them is absolute fantasy. >> reporter: david, this trump event in new hampshire filling up fast. and there are some republican candidates agreeing with trump. >> tom, thank you. one unscripted moment, marco rubio tossing the football. ended up bumping into the guy's head into the heads. later tweeting, the quarterback always gets blamed. next to florida, rain likely playing a role in a sinkhole. the hole where a home once stood. and the man who lived there, in bed as he slept, never found.

here's steve osunsami. >> reporter: tonight, florida authorities are trying to calm the nerves of frightened neighbors. >> what happened today is exactly what was designed to happen. so there's no danger. >> reporter: still frighteningly large. now 17 feet wide and 20 feet deep, and it was supposed to be repaired. the body of 37-year-old jeffrey bush was never recovered from the hole here two years ago. his family here again tonight. >> i didn't get to say good-bye to him. >> reporter: sinkholes are a part of life in florida. about 30 miles away, we saw them using more than ten trucks of sand to fill a 90-foot-wide hole that destroyed a pool and two homes. and look at the same spot today. the property is now for sale. and the realtor says it's probably the safest land you can buy in florida. the county blames this one on recent heavy rains. steve osunsami, abc news, atlanta. >> just incredible. thank you. and in new hampshire,

another sinkhole on a major interstate. repair work is under way. and we turn to the severe weather. several tornadoes striking the midwest. this one, the damage in wisconsin. another tornado, caught on camera in illinois. lightning at atlanta airport. and in north carolina, the driver of this car, hydroplaning. rob marciano tonight. >> reporter: tonight, millions listening for those sirens, ready to take cover. >> so, i hope this thing is not coming at us. >> reporter: raking the heartland overnight, five reported tornadoes. in lake geneva, wisconsin, brutal damage seen from above. and piles of twisted metal on the ground at this industrial park. >> there's 2x4s thrown around here like toothpicks. >> here comes the rain.

and it is really coming down. >> reporter: at chicago's wrigley field, tens of thousands scrambling to safety. >> all of a sudden, it opened up and poured. and you couldn't get to the exit fast enough. >> reporter: the violent storms came packed with lightning. and in omaha, it was too close for comfort. heavy rain bringing flooding to the east, too. thunder and lightning at atlanta's airport causing delays. near charlotte, watch this car hydroplane into a ditch. luckily, that driver able to get out with a little help. and near syracuse, a microburst with 70-mile-per-hour winds downing trees. >> and rob is here now, tracking the radar. >> a very impressive system for august. strong and very large. look at the expanse of thunderstorms covering much of the country. some of the storms with 60-mile-per-hour winds.

and the i-95 corridor could see three to five inches this week. and -- >> rob, thanks. meantime, in alaska, we're following that mudslide, sweeping three to their deaths. heavy rain saturating a mountainside. the accident and heavy flooding triggering a state of emergency. so many homes, the state declaring a state of emergency tonight. and 84 major fires still burning tonight. these are smoke jumpers, parachuting into remote spots in washington state.

and 200 active duty troops training for the firelines. we turn to a guilty plea expected from jared fogle. for 15 years, many knew him as the friendly figure that lost more than 200 pounds eating subway sandwiches. now, leaving court after charges involving minors. alex perez with the story. >> reporter: the subway pitchman today had nothing to say, escorted by police, pushing through a swarm of cameras. his attorney saying jared fogle will plead guilty in a deal that will put him behind bars 5 to 12 years. and fogle will pay as many as 14 victims $100,000 each in restitution. >> he will fully and completely acknowledge his responsibility for his wrongdoing. >> reporter: court documents say that from 2007 to june of this

year, fogle used the internet to allegedly arrange and travel to new york city to meet up with underage girls, and received and distributed child porn. the executive director of fogle's anti-obesity charity was arrested in april. he's accused of sending fogle secret recordings of as many as a dozen young victims. he has not entered a plea. fogle became the face of chain 15 years ago after losing 245 pounds he credited in part to a diet of subway sandwiches. in a statement tonight, fogle's wife saying she is "shocked and disappointed" and "seeking a dissolution of the marriage." the judge had fogle fitted with a gps monitoring device as he awaits his next court date. subway, which had already ended their relationship with fogle, in a tweet tonight calling his actions inexcusable. david? >> alex, thank you. we turn to new hampshire, and the case involved teenagers at a prestigious high school. an assault case making national

headlines. the injury hearing a teenager describe what happened that night. her accused attacker watching. gio benitez with the story. >> reporter: 19-year-old owen labrie sprinting out of court after a day of emotional testimony from his 16-year-old schoolmate who says he raped her in the science building on the leafy campus of their prep school. the teenage girl first describing how she felt when he asked to meet her. >> one of the most popular boys on campus, sure. wow, a special boy wants my special attention. >> reporter: that attention, she says, part of a school tradition called the "senior salute," where graduating seniors reach out to younger students to spend time with them, sometimes intimately. on the stand today, the girl testifies that what started out as kissing turned into rape. >> i didn't kick or scream or really push. i didn't. but i did say no.

i said no three times. >> reporter: but later that night, the teens exchanged the first of many messages. "you're an angel," he writes her. "you're quite an angel yourself," she responds. today, prosecutors asked her why. >> i was afraid of him coming after me again. or coming to confront me or make fun of me. i had no control over what somebody else did to my body. i didn't want to lose control. >> reporter: he insists he never had sex with his accuser. >> thank you. and overseas tonight, and a reversal for oscar pistorius. he was set to get out on friday after just ten months to serve

the rest of his time at his uncle's mansion. today would have been reeva steenkamp's 33rd birthday. and police releasing this sketch of a prime suspect in t deadly bombings. two other men in the video, also suspects. moments later, an explosion left 20 dead. and from syria tonight, a stunning new case of atrocity from isis. you will remember this video. tonight, news that they have publicly beheaded the 83-year-old scholar and archaeologist that tried to stand his ground. and back home, and the difference between heartburn and

a heart attack. ron claiborne with the answers. >> reporter: the latest episode of abc's medical reality show, "save my life" told the story of manny couto, who was visiting his stepdaughter at a boston hospital when he suddenly felt he thought was severe heartburn. it wasn't. >> your ekg tells us you're having a heart attack. >> oh, am i? >> yes. >> i'm dr. crose, the cardiologist who's going to take care of you. >> reporter: couto was rushed into surgery where dr. kevin crose and his team inserted a catheter to clear a blocked artery that could have triggered a heart attack at any moment. >> it looks great. >> reporter: watching at home was 71-year-old dana mower. just like couto, he had indigestion. >> that was it, no question in my mind. especially after watching that show. >> reporter: the next morning, he went to brigham and women's hospital. diagnosis? he was having a heart attack. his doctor? dr. crose. >> i joked that i was glad that he saw the tv show because it got him to us, so hopefully we could minimize the damage to his

heart and make him feel better. >> reporter: tonight, mower is feeling better. just maybe, his life saved by "save my life." ron claiborne, abc news, new york. >> thank you. tonight, we're learning more about the two women, the first to complete the grueling training to become army rangers. both are west point graduates. on friday, they will graduate from ranger school. much more to come this wednesday. the family attacked on their front porch. >> we're being attacked at gunpoint. >> the urgent search. also, the door from the passenger jet landing on an american golf course.

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make your move. ask your doctor about crestor. finally tonight, we ask that question, who wants to be a millionaire? off a popular beach in florida, the $4.5 million discovery. underwater, sifting through the sand. striking gold. the water, not even four feet deep. then they find even more. the gold coins, and a fist bump. from a ship that went down 300 years ago. nine of the coins, worth

$300,000 each. one of the salvagers telling us what they usually find. >> garbage, beer cans, signs. you can't explain the feeling. it was 300 years ago to the day, we happened to find 300 gold coins. >> reporter: the second gold rush this summer. tonight, this newest discovery, still sinking in. >> i felt like i was in a dream. it makes you think, what else is out there? >> thanks for watching this wednesday night. we'll see you tomorrow.

[ whines ] [ clock cuckoos ] [ belches ] [ giggles ] it's america's game! wheel... of... fortune! ladies and gentlemen, here are the stars of our show -- pat sak and d vanna white! hello! whoa! oh! i think i fell on your dress. [ chuckles ] a nice way to put out the new year. thank you. [ speaks indistinctly ] see ya later. heo, hello. it's new year's eve! we thought we'd invite some famies to play with us and, uh, to ring out the old. and, uh, ask you to all get ready for our first "toss up." $1,000 at stake. it's a "phrase."