breaking news tonight. an american city under water. deadly floods and dramatic rescues under way. families using anything that floats to escape. schools closed. thousands without power. the driver swimming from his sinking car. a reporter pulls him to safety. and more rain on the way tonight. also breaking at this hour, race against time. the death toll climbing. three major earthquakes in just three days. could america's west coast be next? battle for new york. the final push. bernie sanders facing a must-win in hillary clinton's home state. she fends off a new attack from donald trump. >> i think he's the donkey of the decade. desperate manhunt. the urgent search for two brothers on the run, suspected of killing their neighbors. police unable to find the victims. and the wild scene at the zoo. a woman jumps the fence into the tiger cage.

wait until you hear why. good evening. we begin this monday with that major american city under water. houston shut down tonight after record rain. the flooding now deadly. the images, gripping. hundreds escaping their homes in the rain. this man guiding his way through waist-high water. families walking away with all they could carry. and panic for this driver, as his car sinks on the road. how he survived, in a moment. abc's fill lynn mena starts us off from houston, where they are bracing for even more rain. >> reporter: tonight, in houston, an epic flood emergency. >> this is an unprecedented amount of rain that we are getting. >> reporter: nearly 20 inches of rain breaking records. inundating more than 1,000 homes. flooded roads turning deadly, claiming at least four lives. >> attention units. don't drive through high water. stay put. >> reporter: hundreds of water

rescues. boats led out through chest-high water. neighbors helping neighbors at this apartment complex. air mattresses, even a refrigerator turned into a makeshift boat. families getting babies to safety. including 7-month-old jayceon. >> it was really hard to get out of there. >> reporter: the devastation can be seen for miles. more than 100,000 lost power at one point. the water coming up fast. swamping vehicles, trapping driver drivers. >> these are dangerous conditions. >> reporter: abc station news reporter steve campion spots this black honda in rising water. with a man inside. >> what should i do? >> swim! >> reporter: he struggles against the current. campion rushing to pull him out. >> come here, sir. >> thank you. >> reporter: only 30 seconds after the man escapes, his car is totally submerged.

>> my car is under. yeah, i had no idea i was going to go so deep. no idea. >> reporter: for the second time this year, the braise bayou has spilled into this neighborhood. the homes here among the thousands or so damaged in the floods. and george, these waters are slow to recede. >> phillip, thank you very much. abc's rob marciano also in houston. they just declared a state of emergency in houston, and this rain isn't over. >> reporter: no, it's not. we have several more rounds coming and although the flooding has receded here, it's been enough to flow cars like this and it's littered across the city of houston because of this. we're in this blocking pattern. we're going to see more rounds of rain. high pressure to the right. relentless rains bumping into that. we're in a locked weather pattern here. a lot of gulf moisture to deal with. severe thunderstorms, as well. houston seeing maybe over ten inches of rain. this is going to go down as the wettest day on record here in houston. we've got a couple more days

left. could seal four to five more inches, george. >> rob, thank you. we move on now to the three powerful earthquakes in three days. the hunt for survivors intense. a race against time. but in ecuadors, rescuers had to pause the search. in japan, back-to-back earthquakes triggered landslides, destroying roads, isolating hard-hit towns. all of the quakes along the pacific ring of fire, which also including the u.s. west coast. abc's linzie janis is on the scene in ecuador tonight. >> reporter: this is the moment a 7.8 magnitude earthquake strikes. panicked screams. and then, the lights go out. entire city blocks leveled. homes collapsed with people still inside. more than 350 dead and thousands more injured. this overpass is one of the busiest roads in guayaquil. the powerful earthquake causing it to collapse, shredding tons of concrete and steel. american teacher brian bayer

inside this badly damaged building when it struck. >> the entire building was jumping up and down. it was the scariest moment of my life. >> reporter: these firefighters working for hours to free this man. nearby, a man talking through a tiny hole to his family, stuck below ground. across the pacific, japan still reeling from those two deadly jolts that hit in the dead of night. >> earthquake? >> reporter: abc's matt gutman hiked to this dramatic scene. >> reporter: this mudsligd was over a half mile wide. it came roaring down this mountain, ripping it in half then 0 deliberating that bridge and those roads on the other side. >> reporter: those three deadly earthquakes all on the volatile ring of fire that also includes the west coast of the u.s. so, tonight, many are asking if we're next. >> here in california, we expect an earthquake the size of the money that hit in japan about once every decade or two. we can tell from geology the

pacific northwest, at some point, they're going to have a magnitude nine. >> a chilling warning there. linzie janis is with us from guayaquil. and linzie, so much concern that this death toll is going to rise even more. >> reporter: that's right, george. with so many still missing, that number is expected to rise. we're also learning tonight that one american is among the dead. but on a brighter note, three people have now been pulled from a collapsed shopping center where they were trapped for more than 32 hours. george? >> small bit of good news. linzie, thank you very much. the race for the white house now. and tomorrow's high stakes primary in new york. bernie sanders hoping for an upset after his biggest rally ever in brooklyn this weekend. hillary clinton kicked it up in washington heights, breaking into a latin dance, as a new national poll shows the race tighter than ever, a virtual tie. abc's cecilia vega tonight on the new york battle that could be decisive for the democrats. >> reporter: on the eve of the vote, neither side can afford to lose, the final push. >> cheers! to victory tomorrow.

>> reporter: hillary clinton trying to avoid an embarrassing loss in her adopted home state, and tonight, letting slip what a win here would mean. >> i am hoping to do really well tomorrow and, i'm hoping to wrap up the democratic nomination. >> reporter: bernie sanders took the big apple by storm, too. today, on foot, strolling through midtown manhattan. but the crowds on the streets nothing compared to that mammoth rally in his native brooklyn. >> new york state, help lead this country into the political revolution. >> reporter: sanders may have the momentum, but what he needs now is votes. if he loses new york by ten points, sanders will need to win 80% of the remaining delegates to clinch the nomination. now, donald trump is unveiling his new unflattering nickname for clinton. >> crooked hillary. >> reporter: on "this week," clinton telling george, bring it on. >> i don't respond to donald trump and his string of insults

about me. i can take care of myself. >> reporter: and today, clinton found her own name for trump. >> does donald trump scare you at all? >> i think he's the donkey of the decade. >> cecilia joins us now from a bernie sanders rally in queens. he's been getting such huge crowds, but one of the big questions, how many of them can actually vote for bernie tomorrow? >> reporter: well, george, independents are barred from voting here. the democratic primary in new york. and that is a voting block bernie sanders has done well with. in fact, he has lost all three contests where independents were barred from voting. but look at this crowd here behind me tonight, george. there is no question, he's got the momentum right now. >> okay, cecilia, thank you. let's move to the republicans. and donald trump looking for a big rebound in new york after a string of losses to ted cruz. trump had a show of support from the national diversity coalition for trump today. but cruz, far behind here after criticizing new york values, campaigned today in maryland. and tonight, abc's tom llamas asked trump, does cruz's recent

success with delegates make him better at the art of the deal? >> reporter: tonight, donald trump with a simple message for new york. what do you want to tell new yorkers today? >> go out and vote. it's more mornt than anything else, tom. >> reporter: the gop front-runner hoping for a landslide win, playing up his local roots at every turn. >> i love being with you people. the same accent. i have that same beautiful little twang that you do. >> reporter: but as trump crisscrosses new york, senator ted cruz crisscrossing the country, sweeping up more delegates saturday in wyoming. on "gma," cruz insisting his hard work will pay off at the convention. >> you can't get the nomination without earning a majority of the delegates elected by the people, and i believe donald trump's highest total will be on that first ballot, and he will go steadily down. >> reporter: trump dismissing cruz's victories, tweeting "lying ted cruz can't win with the voters, so he has to sell himself to the bosses." the billionaire even envisioning

how he would woo delegates. >> nobody has better toys than i do. i can put them in the best planes and bring them to the best resorts anywhere in the world, but it's a corrupt system. you're basically buying these people. >> reporter: but i asked trump if he's only complaining because cruz is outfoxing him. is he the real deal maker right now behind the scenes? >> no, i'm leading by millions of votes and by 200 delegates. no, we're doing really well. >> and tom joins us now from trump tower. so, mr. trump sounded pretty confident right there and he's looking ahead to the convention, saying he wants more showbiz, but also warning of a rough july. >> reporter: george, good evening. donald trump has said that he does not want violence in july, but at the same time, he also says the rnc has to straighten out the system when it comes to delegates, because people want their votes counted. insinuating it could get ugly in the summer. george? >> tom llamas, thank you. we going to washington tonight, there was a showdown at the supreme court over immigration. and president obama's executive action sheeding millions of

deportati deportation. hundreds of 0 waobama supporter there, as well. abc's jim avila on the arguments inside that courtroom. >> reporter: immigration, the flashpoint dividing the nation. tonight, on the doorstep of the supreme court, in perhaps its biggest case of the term. texas leads 25 other states, claiming president obama has gone too far with executive actions, granting millions of otherwise law-abiding undocumented immigrants the right to stay and work in the u.s. >> one person doesn't have the unilateral authority to change the law or make new law. >> reporter: but today, texas admitted under tough questioning from supreme court justices that congress has not given the president enough money to deport all 11 million immigrants here illegally. so obama does have the legal right to make decisions about who gets to stay. with the death of justice scalia, the court now appears divided, 4-4, along conservative and liberal lines.

because we don't have scalia, what does 4-4 mean? >> the federal government loses. the lower court opinion, which found against the program stays in effect. >> reporter: that would be a big setback for president obama. his immigration policies. and the court itself. concerned about appearing ineffective and partisan. george? >> thanks, jim. well go overseas now, to iraq, defense secretary ash carter in baghdad today, offering new military help in the fight against isis. 217 more american troops heading to iraq, mostly special operations forces, putting the number of u.s. troops on the ground above 4,000. and for the first time, eight apache helicopters will be deployed in the fight against isis. and now, today's boston marathon. it went off without a hitch, under heavy security. three years after those deadly bombings at the finish line. and tonight, we have new details from inside the fbi. here's abc's chief investigative correspondent, brian ross. >> reporter: it was a joyous day in boston, until that first blast.

>> oh! >> what the hell was that? >> reporter: this key surveillance video shows the crowd reaction. >> oh my god, something blew up. >> reporter: over the next 12 seconds, some will decide to leave the area. but most will stay. >> i was, like, oh, my god. we got to get who is responsible for this. >> reporter: tonight, the fbi agents who cracked the case using this chilling video, provide new details and show how it was done. >> he was hidden in plain sight. >> reporter: for the first 24 hours, the agents could not pick out the man they were looking for -- this man. then, this still picture came in on day two, and at the site of the bomb was this backpack, and nearby, the man in the white hat. >> that was the a-ha moment, this is who we're looking for. >> reporter: putting the surveillance video in reverse, agents then spotted white hat with another man, black hat. but tamerlan and dzhokhar tsarnaev. but they would not be stopped for two more days.

>> oh, my goodness. >> reporter: only after one police officer was killed -- >> officer down. officer down. >> reporter: and a wild shootout with police left one of the bombers dead. the remaining bomber hid for 17 hours in this boat, until the owner discovered him and called 911. >> i have a boat in my yard, there's blood all over the inside. there's a person in the boat. >> are you sure? >> i just looked in the boat. >> reporter: within a few hours, the younger tsarnaev was in custody and the city and the nation applauded. had they not been caught, they had planned to head to new york and set off bombs here in times square, george. >> hard to imagine it could have been even worse. thanks, brian. you're going to have a lot more tonight only "nightline." and the full episodes of "five days" will be released daily across abc news platforms. and in boston today, more than 30,000 runners crossing that finish line attacked three years ago, under sunny skies. so many inspirational stories.

this picture showing two runners carrying a third runner across the finish. and at fenway park, jeff bauman, a double amputee, seen here in that iconic photo the day of the attack, throwing out the first pitch, right down the middle. much more ahead on "world news tonight" this monday. the missing couple mystery. a manhunt under way. police searching for a dangerous pair of brothers accused of killing a husband and wife, who no one can find. the new health alert tonight. common medicines in millions of homes that may increase the risk of dementia. and this stunning moment at the zoo. the woman jumping into a tiger cage, for a reason so hard to believe. ♪ ♪ ♪ that's life. you diet. you exercise. and if you still need help lowering your blood sugar... ...this is jardiance. along with diet and exercise... jardiance works around the clock...

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couple. the fugitives considered armed and dangerous. >> the public should absolutely be worried. >> reporter: the married couple patrick shunn and monique patenaude disappeared last monday. four days later, police finding their two vehicles dumped in the woods 15 miles from their home. authorities telling abc news unreleased surveillance video ties the suspects, john and tony reed, to the disposing of the victims' vehicles. >> based on evidence collected from the missing couple's vehicles and evidence collected from the former john reed residence, detectives believe patrick and monique were murdered. >> reporter: the four had property disputes, according to police. family members saying in a statement, the couple had been married only four years. wherever they are, they are together. george, this manhunt entering its eight day. and police telling us tonight, they have no idea where the suspects are, but they do believe they fled in their parents' vehicle. george? >> okay, kayna, thank you very much. when we come back, a health alert tonight about something in

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in tonight's index, a scare at the toronto zoo. this video shows a woman jumping into the tiger cage to fetch her hat. a tiger paces back and forth. the two separated by a fence. and when she climbed out this, confrontation with angry parents and zoo workers. the scene comes one day after a zoo keeper was mauled by a tiger in florida. a health alert tonight. a new study warning certain medications may increase the risk of dementia. including tablets for cold and

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and finally tonight, a movie star couple in the doghouse. johnny depp and amber herd shooting a 39-second video to apologize for offending an entire nation. critics are saying it's not their best work. here's nick watt. >> i am truly sorry that pistol and boo were not declared. protecting australia is important. >> declare everything when you enter australia. >> reporter: online wags say it's a hostage video in what they call the war on terrier. >> australia is a wonderful island with a treasure trove of unique plants, animals and people. >> it has to be protected. >> reporter: "i don't think it would be something they would have willingly wanted to do," dead-panned the aussie deputy pm, who once threatened to kill pistol and boo.

>> mr. depp has to either take his dogs back to california or we're going to have to euthanize them. >> reporter: back then, depp called him a "sweaty, big-gutted man." today? >> when you disrespect australian law, they will tell you firmly. >> reporter: jack sparrow, choking on humble pie. turns out, the critically cudgeled mortdecai -- >> what's in it for me, as they say? >> reporter: -- was not the nadir of depp's fine acting career. >> australians are just as unique, both warm and direct. >> reporter: nick watt, abc news, los angeles. >> and that is all for us right now. have a great night. check out "nightline" later. and i'll see you tomorrow on "gma." ♪ this afternoon at dunkin', sip and save with a freshly brewed favorite for 99 cents.

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