A flash flooding emergency sparks overnight rescues in texas. Millions could be hit today. Desperation and despair after a massive earthquake kills hundreds. Were in ecuador with the search for survivors. Donald trump says there might be violence if republicans do not nominate him. And Bernie Sanders returns to studio 57. But we begin with a look at todays eye opener. Your world in 90 seconds. [ applause ] National Emergency declared in ecuador following a 7. 8magnitude earthquake. The search for survivors continues. Official admitting they cant even calculate how many people are missing. Many parts of the country are barely recognizable. In southern japan there are still two people missing after powerful earthquake. The u. S. Military is joining rescue efforts. In the primary, donald trump is looking for a big win. We have crooked hillary, could say whatever he wants to say about me. I could care less. Flash flooding in texas with some areas seeing up to six inch of rain. Colorado pounded by a slowmoving snowstorm. You wouldnt think youd have to do this in spring. The top researcher says american women need be worry about pregnancy and the zika virus. Right now there are no local transmitted cases. Tight security in boston as the city gears up for its marathon. It makes us ready for any type of scenario. A junkyard inferno kept hundreds of firefighters busy in los angeles. I saw the fire over there all that a little boy draws on the mirror before pinning it on the caped crusader. Slice foul. Nice check out the elevation. Its beautiful. Thank you. All that matter up. How exactly are you going to break up the big banks . Im going to the big banks, yadda, yadda, theyll be broken up. On cbs this morning. What . Everyone thinks you are by far the funniest i mean, the most qualified what the hell am i . Youre bald [ applause ] bernies getting upset this mornings eye opener is presented by toyota. Lets go places. Welcome to cbs this morning. A huge spring storm is hammering large areas of the countrys midsection. Dramatic video shows a series of lightning strikes up close overnight outside houston. Torrential rain and flooding led to more than a dozen highwater rescues in houston overnight. The city has activated its Emergency Operations center. The violent system stretches about 1,000 miles from the dakotas down into texas. Growing fears about flooding. Man man manwel, good morning. Reporter the rain was relentless overnight. Look behind me. This is the spillway of a reservoir in the middle of the city where the water level has been consistently rising. The situation much worse south of here in the houston area. 60 highwater rescues and counting. Some parts near houston have received more than 16 inches of rain already, and thats more than they typically get in a month. [ thunder] reporter rolling thunderstorms battered portions of texas late sunday night. Lighting up the skies over houston. A canoe or something. I got to work tomorrow. Reporter the rain came down in buckets overnight. Nearly 13 inches in only six hours. Torrential downpours flooding streets my streets currently a and threatening homes. The rush of water transformed yards into lakes. Sure its a back yard. This is how it rains in texas. Reporter and normally slowmoving creeks into raging rivers. Along the texas gulf coast, rising waters spilled on to roadways in and around galveston. I came from work at united, and i cant get home. Reporter Bernice Harrell has been trapped at that gas station for over three hours because of the floodwater. Ive never seen anything like this out here. I just want to get home. Reporter houston has the Largest School system in texas. Officials there have decided to cancel classes for the day because the weather is expected to last all day. Gayle . Thank you, mannuel. The 7. 8magnitude quake in ecuador killed at least 272 more than 2,500 others are hurt, many others still missing. The destruction stretches hundreds of miles from the epicenter along ecuadors coast. We have more from guayaquil, the site of one dramatic rescue effort. David, good morning. Reporter good morning, the power of that 7. 8 earthquake was enough to bring down this bridge in guayaquil. It is 300 miles from the epicenter of the quake. This here is the windshield of one mans vehicle on the ground left behind after rescuers tried to save the man. His car was crushed when the bridge fell on top of it. His wife was in the car with him. She survived. The man died instantly. The bridge collapsed. You see it separated here. Rebar sticking out. The largest city in ecuador has damage, but for most part it is minimal. North of here, people are using their bare hands this morning to pull their neighbors from the rescue teams pulled this woman from the rubble sunday. She was trapped under a fallen roof. And people cheered as a small child and several others were rescued from a fivestory building that had collapsed. These are the few stories of triumph in what seems like a sea of devastation. Hundreds of people are dead. Thousands more are injured. And ecuadors Vice President admits a large number of people are still unaccounted for, possibly buried under debris. I saved my family at least, this woman said. My little nephew is still inside. This appears to be the moment the 7. 8magnitude earthquake struck saturday night. This woman tries to brace herself between two cars as the ground rocks violently beneath her. Alice gandelman and her husband are from california. They on vacation in san clemente. The Northern California couple but nothing like this. The shaking continued and got more and more intense. There was a big boom. It was about 49 seconds long, which is a very long time to have the earth moving under your feet. Reporter there is significant damage. More than 100 miles south of the epicenter in portia vajejo where a hospital classed. Nearby, 180 prisoners escaped from a jail. At sunrise this morning, search and rescue will resume across this country in the hardest hit areas. In the city, one man was quoted as saying, you can hear people calling for help, but we just cant get to them. Boy, heartbreaking to hear. Thank you very much, david, from ecuador. Video shows the widespread destruction in japan after two massive and deadly earthquakes there. Homes are collapsed and roofs torn apart. The u. S. Military is joining the relief effort. Struck kyushu. Access is limited to hardhit areas. Teams are looking for survivors. The death toll is at least 42. Nearly 1,100 people are hurt there. Were just getting word this morning of a possible mass drowning of refugees in the mediterranean sea. It involves a ship that reportedly left egypt, possibly headed toward italy. The italian president says this morning it seems several hundred people have died. Officials have expected a larger flow of refugees from the middle east to europe as the weather gets warmer. Turning to politics, new yorkers vote tomorrow in one of the countrys biggest president ial primaries. The latest cbs news background tracker poll shows donald trump leads ted cruz by 33 points. Trump also has doubledigit leads in pennsylvania and california, two more states with lots of delegates. In spite of his advantage, trump is still bashing the republican he calls it a rigged system. We have more from outside trump tower in manhattan and a preview of the vote. Major, good morning. Reporter good morning. Donald trump needs to reset his campaign. New york will give him a Good Opportunity to do that. After a string of delegate losses to ted cruz, trump is well positioned to win most of the states 95 delegates. Now, that will not end the feud with the Republican National committee but will give the Campaign Something its been craving of a late a victory. I hope it doesnt involve violence, and i dont think it will. But i will say this, its a rigged system. Its a crooked system. Reporter over the weekend, donald trump mixed veiled threats of violence with his longrunning rant against gop rules. The Republican National committee, they better get going because ill tell you what, youre going to have a rough july at that convention. Priebus defended his partys rules. Im talking to many Media Outlets as much as i can to set the record straight. Im not going to allow anyone to rewrite the rules of our party. Reporter ted cruz continues to outmaneuver trump for delegates. In wyoming, cruz swept all 14 of the delegates available at this weekends convention. In georgia, a primary trump won and where cruz came in third, cruz grabbed 32 of the 42 remaining delegates at gatherings across the state. Prompting Trump Supporters in one meeting to walk out, taking the American Flag with them. In a significant shift, trump now says he knows the rules but chooses to ignore them in the name of reform. It would be easy, ill go, ill fly wyoming, ill meet the chairman. I guarantee you within ten minutes, hes my best friend. Hed drop a guy like cruz in about two seconds, okay. But i just dont want to do it because its not the right thing to do. System has to change. Reporter the rnc rules committee which sets the rules and procedures for the july National Convention meets later this week in florida. The rnc chairman sent emails to key members of the committee urging them not to change anything lest trump and his supporters become more agitated and other campaigns more confused. Norah . Interesting week. Thank you very much. Our Battleground Tracker poll finds Hillary Clinton with a tenpoint lead in new yorks democratic race. Bernie sanders brought out a big crowd yesterday. Organizers say more than 28,000 people attended a sanders rally in brooklyn. The biggest hes had so far. We have more from the eve of this important vote. Nancy, good morning. Good morning. Candidates out of new york for a spell this weekend. Clinton raised money with George Clooney in california. Sanders met with the pope in rome. Now they are back, fighting for have deep roots. Got to vote. Bernie sanders. Im not going to lose. Reporter the brooklynborn senator made the rounds of his home borough sunday from the Brooklyn Bridge to Prospect Park with a recordbreaking Homecoming Party that, according to the campaign, drew 28,000 people. Our parents would take us to Prospect Park [ cheers ] they still have the sales andeals and elephants. Narrator reporter it wasnt all light hearted Hillary Clinton and i disagree on trade policy, disagree on minimum wage policy. [ boos ] reporter clinton let loose a little in washington heights. But in brooklyn, she got down to business, too. We talked about the greed and recklessness of wall street. I take a back seat to no one in taking that on. Reporter sanders disagrees. In this new ad, he doesnt name clinton, but its clear she is while washington politicians are paid over 2 huth00,000 an hour for speeches, they oppose raising the living wage to 15 an hour. Reporter on face the nation, sanders repeated the attack. Maybe it you make 225 hour, you dont know what its like to live on 10 an hour minimum wage. The people who are behind the fight for 15 support me, not him. Reporter money came up again in california outside a 33 perplate fundraiser at the home of George Clooney. Demonstrators rained dollars bills on clintons motorcade. Even clooney said he gets it. It is an obscene amount of money. The Sanders Campaign when they talk about it is absolutely right. Its ridiculous that we should have this kind of money in politics. Reporter clooney says hes raising money to get democrats elected so they can change Campaign Finance laws and get money out of politics. In fact, he says he likes bernie passionate about that issue and hopes he stays into the race until the very end. Thanks, nancy. Our next hour, senator sanders will be here in studio 57. Later today ill interview president obama at the white house. You can see parts of the conversation tonight on the cbs evening news. More tomorrow on cbs this morning, and the full interview will air tomorrow on a pbs program. Wow. Looking forward to that. A lot to talk about. Absolutely. Brazils first female president , dilma rousseff, is a step closer to being removed from office. The lower house of congress voted yesterday to impeach her. [ cheers ] rousseff is accused of manipulating government accounts to manage the budget. Brazils senate will decide in may if she should stand trial. If so, rousseff would have to step down temporarily just months before brazil hosts the olympics. British official this morning are trying to determine if a drone hit a passenger plane. About to land at Londons Heathrow airport at the time. Nobody was hurt. It may be the first reported incident of its kind involving an airliner. Mark phillips is at heathrow now bring us up to date. A lot of people have been worried about this. Good morning. Reporter good morning. Well, this was, many people say, an accident that was waiting to happen. Of course, its an accident that never should have happened because there are strict rules about flying drones around airports. Still, it appears that despite the rules, there was a drone in the air here at a busy period yesterday when an inbound flight carrying 139 people coming from geneva collided could, the pilot says, with his drone. Hes convinced the plane was in the collision. The plane did land safely. It was examined and allowed to continue on its flight later yesterday afternoon. Police are taking the report seriously. They issued a statement saying, an object believed to be a the aircraft, and theyve launched an investigation. The british have been struggling with drones like everybody else. Theyre everywhere but are not supposed to be around airport for obvious reasons. There are strict penalties. Of course, first you have to find the drone, and then you have to find whoever was flying it. There is also the Pilots Association saying that they have been calling for experiments to see what would happen when a drone did collide with an airport. Now that thats happened, luckily the damage was not serious. Thank you very much. About 30,000 runners are getting etrade to getting ready to start the boston marathon. The third race since the deadly bombing in 2013. Miles of fencing separates runners from fans along the route. An estimated one Million People are expected to come out and cheer on the runners. We have more there the starting line in hop kinton, massachusetts. Jeff, good morning. Reporter good morning, this for law enforcement, the race to secure this event began last year. There are 55 different agencies involved in this. A lot of the attention is going to be on the Boston Police department and what it does three years after the bombing. Signs at the massive security effort were evident on bostons boylston street. Were not going to live in fear. Were going to have a great time and be aware. Reporter about 5,000 uniformed officers from eight cities and towns will line todays marathon route. Throughout the event, the national guard, state police, and federal agents will use this underground command bunker to share information and monitor online chatter. Overhead, four Massachusetts State Police helicopters will be on patrol. Their infrared cameras can zoom in on suspicious objects from more than 600 feet up. At 120 knots, they can cover the during a practice run, we could see the red sox warming up before a game at fenway park. Security was ramped up after the 2013 attack when tamerlan and Dzhokhar Tsarnaev set off two Pressure Cooker bombs near the finish line, killing three and injuring hundreds more. It just sort of brought back a lot of emotions of what happened here. Narrator Bostons Police commissioner, william evans, is a runner himself. Following the recent attacks in brussels and san bernardino, he decided not to participate in this years marathon. I need to be out on the route making sure everything goes well. Narrator commissioner evans says he still worries about copycat attacks. What happened in paris and what happened in brussels makes people uneasy. I think anywhere can be a target. Reporter but there is no specific or credible threat against this marathon. Commissioner evans says his department is working with the threat. Gayle . Thank you. Glad theyve got good weather today. Such a good attitude. Such a good attitude. Good luck to all the runners. Ill say. We thank you again, jeff. She lost her husband in the september 11 attacks. Ahead, how this woman believes that president obama is blocking justice. If someone you loved was murdered and the person was just able to go away scotfree, would i dont think anybody would. Americas big money mystery could be solved this week. The change to our currency. How could Alexander Hamilton and some of the most important women in our nations history fare . The news is back in the morning here on cbs this morning. [alarm bell ringing] oh no, the car told ya somebody shouldve waited in the car. It says theres a black car three minutes away im not taking one of those. That one in a prius. Now the four mostwanted men in the world are stealing our hearts. Is that us . 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