Joining now is deputy fire chief, john donnelly. Chief, tell me what the situation is. So about 30 minutes ago, fire and ems arrived on the scene of a house under construction. In the foundation work, there was a collapse sort of accident. We dont know the cause. And right now were working to make the scene safe so that we can go in there and try and get the injured person all the way out safely. Reporter there is a man trapped down there, right . Sure. Reporter and hes up to his chest in dirt . Up to his waist and shoulder in one side. Reporter and so what do you have to do to get to him . So we have to shore the walls with lumber and metal framework so that they dont collapse any more and nobody else gets hurt. Reporter and how long do you think this could take . The rule of thumb is that its an hour for each foot youre digging out and its going to be a little while before we can get to diggi digging. So this could go on for the rest of the day. Reporter thank you very much, chief. Good luck with this. Thats deputy fire chief, john donnelly. Again, what happened here, there was a construction accident, a house being built here on dexter street. Theres a man trapped down there under some dirt. Firefighters have to go down and shore it up before they really can move in to try to extricate him. Its going to take hours. Well be here and keep you informed of the progress. Again, 4600 block, dexter street. Construction accident. One of the workers is trapped below. Now back to you. Thank you, pat. We are following two developing stories out of Prince William county this morning, starting with a child who was hit by a car manassas. You can see chopper 4 over the scene as paramedics loaded the child this afternoon. It happened at ashland avenue were told the child was seriously injured. Police blocked off the road around the school bus, but witnesses say the child was not getting off or on that bus. The sixth grader at stone wall Jackson Middle School was walking across the street when he was hit. Northern Virginia Bureau chief julie carey will follow this story throughout the day. You can follow her on twitter at julie carey nbc. The other developing story, an explosion at this house that was under construction. It happened on cons road in manassas. Still not clear what caused it. Prince William County fire said someone was working on the house and was hurt and had to be flown to the hospital. It started out to be a beautiful day, but how is it going to end . Storm team 4s Lauren Ricketts is here with the forecast. Yes, and i think its going to end a little bit on the wet side, unfortunately. Because we have got some rain moving into the area. Now, its going to be dry as we continue over the next couple but clouds already starting to move in, and theyre going to continue to move east. Not before our temperature tops out in the mid to upper 60s. Right now were already at the 60degree mark and its so nice out there. Were already above our daytime high for yesterday. So were going to keep moving that mercury on up into the mid to upper 60s. Again, we will have some rain showers moving in after 4 00 or 5 00. It will not fall too far. Could we have 80s in the forecast . Well have the tenday forecast and maybe some Severe Weather on the tenday all coming up in just about 15 minutes. Jewish communities again on edge today after a round of bomb threats yesterday. The targets, children, schools and Community Centers. News4s justin finch is following this developing story. And how those places are responding. Justin joins us live from rockville right now. Good morning. Reporter angie, understandable concern this morning as teachers, stan these threats to Young Children as they also work to protect them. On a bright tuesday morning, a return to routine at charles east smith jewish day school, a day after a dark threat of a bomb on its campuses. It was a hoax. We are here with a smile on our face. We, you know we remained calm yesterday. We didnt want to alarm anybody. And, you know, as far as today goes, today is just a normal day. Reporter the smith school in rockville, one of three area jewish day schools getting bomb threat calls monday morning. Fairfax day school in annapolis did, too. Both schools evacuated, returning after getting allclears. Montgomery county police swept the grounds as students remained inside. All clear there too. Staff working to keep parents informed. There is obvious concern that we provided parents with updates as we receive them. And they felt very comfortable that their chen hands with us. Reporter smith among 31 juish day schools and Community Centers threatened by bogus bomb hoaxes. Smith, staff expecting students will want to talk. We encourage our students to ask questions and our teachers are prepared to answer and support our students in any way they can. Reporter and we can tell you these threats remain under local and federal investigation. The staff here at smith stepped up their standing security plans to further protect their students. Live here in rockville, justin finch, news4. Back to you. Justin, thank you. Similar threats happening across the country. Just yesterday, hoax calls came in to jewish day schools and Community Centers in at least a dozen states. This has been happening since the new year. And virginia senator, tim kaine, addressed those threats at a conference last night in the district. The j stre c largest gathering of American Jews since President Trump took office. Antisemitism, senator kaine says, cannot be tolerated. We cannot allow that to go unchallenged. As people who care deeply about our faiths, we have to speak out against the dimution of others. Yesterday White House Press secretary, sean spicer, said, quote, no one should feel afraid to follow their religion of their choosing freely and openly. End quote. President Trump Takes Center Stage tonight when he addresses a joint session of congress. Its a chance for the president to make a pitch to lawmakers about his legislative priorities. Molette green has a look at what to expect tonight. Molette . Reporter pat, good morning. A lot from lawmakers here inside the office building. Those on both sides of the political aisle watching tonight it is a critical speech for mr. Trump. A reset, if you will, after a bumpy 40 days. This is being billed as the renewal of the american spirit. The president will go over his plans to overhaul the Affordable Care act. His most recent comments about it being a very difficult, complicated process. Were also going to hear him talk about beefing up the military and border security. And one of the critical points here that will come in his remarks, asking congress to okay 54 billion in defense spending. And also 54 billion in cuts to domestic programs and foreign aid. Federal workers we have been talking to are very concerned about their job security. Im worried about job cuts. Im also worried about hiring future employees if they cut the salary and benefits too much. It could hurt future concerns about job cuts everywhere else. But, you know, Government People are people too, and they need jobs also. Reporter now mr. Trumps full budget will not be an easy sell to even his fellow republicans. The full plan is expected out in may, and we do expect a lot of back and forth between the white house and congress. That is the latest, live from capitol hill. Im molette green, news4. Thanks, molette. You can watch the president s address live on nbc 4 right after the voice this evening. Speech starts at 9 00 and look for live coverage and the analysis on news4 at 11 00. The most decorated olympian of alltime and baltimore native, Michael Phelps just testified before lawmakers on the hill. He was there to talk about doping, selfset athletes need to believe in their own talent. He also said the abundance of testing is necessary to examine the current state of the International Anti doping system. The challenges it faces and ways it can be improved. This hearing comes less than a year from the Winter Olympics in pyeongchang. New this morning prince Georges Schools or County Schools should learn today if they get a waiver from the state to begin the 201718 school year in august. The County School board chose to defy the executive order mandating maryland Public Schools have a post labor day start. Multiple state officials told the iteam they received a formal request from prince Georges School last night. A formal decision has been handed down this morning. Prince georges case will be closely watched by other districts statewide. Montgomery County Schools voted last night for a School Calendar that begins post labor day in the board of education voting unanimously last night to up date the calendar. Schools will start september 5th and end june 12th. Schools will start after labor day and end before june 15th. The principal of Wilton High School in the district is asking parents to talk to their children about what could have been a dangerous situation. Yesterday a 16yearold was arrested for taking a loaded gun to the school in northwest. That student was stopped at a security checkpoint on campus. The teens name has not been released. Now to a developing story. A man shot and killed in the district. D. C. Police now just releasing his name. 31yearold james mace, was shot just off of north capital street. Thats about a block or so from dunbar high school. Police do not have information about a suspect in this case so morning for a maryland family searching for their missing 4yearold. Matthew carrington disappeared in maryland in october. The fbi says the 4yearold was spotted over the weekend in birmingham, alabama. Investigators believe hes been in that area since shortly after his disappearance. The fbi says carrington is with people who are considered armed and dangerous. We have already posted his picture on the nbc washington facebook page. You can share that from our page. There is still more to come on news4 midday. We are checking in on the festivities in new orleans on this fat tuesday. A live look from t its going to be hard for you to find an affordable ticket to tonights wizards game. Thats because Prince Georges County native, hometown hero, kevin durant is here for the only time this season. Not only that, he is on the best team in basketball. The golden state warriors. They have lost just nine times in almost 60 games so far. The least expensive tickets we found, the ones from the wizards are about 70 at the moment. On stub hub, theyre going for more than 100 bucks. Its going to be an exciting game. You know his mom is going to be going, wanda. Of course. Mardi gras revelers taking to the streets thats right. Nbcs jay gray gives us look around the celebrations in the French Quarter. Reporter parades and parties in a place that marches to its own beat. Were so unique here, were like no other place in the world. The best place in the world, in our opinion. Reporter an opinion shared by hundreds of thousands in new orleans from mardi gras right now. Some for the first time. Fantastic. Love it yeah. Having a great time. Cant believe it. Reporter others who are carnival veterans. Up on the river front, the parade. Its wonderful. Reporter and at least one who traveled all the way from france for this festival. Really great. I love it. Its really fun. I have never seen Something Like this. Reporter there isnt really much like all of this. And so make sure it stays safe, an army of police are keeping a close watch over we want people to know your limits, be aware of your surroundings. By all means, do not drink and drive. Reporter over the weekend, a drunk driver plowed into a parade crowd. 28 people are injured, but all expected to make a full recovery. Roads around the French Quarter are locked down now. Closed to vehicle traffic as the crowds take over on a quest for beads, bobbles and all the other things that come with mardi gras. Jay gray, nbc news, new orleans. Today you can help the fight against human trafficking. All it takes is your bra. The Loudoun County rotary club hosts its abdominnnual mardi br organization, it provides a source of income for women rescued from human trafficking. So the girls will take the bras donated and they will then donth resell them and take that money to for their livelihood. And these are for the bras go to victims of human trafficking. The event takes place tonight from 6 00 to 9 00 at the black fin pub at loudoun station in ashburn. You can dress in costume if you like. There will be prizes given out. Donations. Search mardi bras in the nbc washington app. All this week, we are working on getting you less stressed. So this morning, we are heading back to class. And beyond with some specific tips on what you can do with your children at home. Now breathe in and breathe out. Reporter at just meditate, young minds at work. Its a class just for kids. But their parents, not far behind. In fact, some share in the experience of exercises involving breath, sound and the meditation experts say mindfulness gives kids an inner resource they can use in times of need. He adds, technology can be a good backup. So many different mindfulness apps from meditation timers to guided meditations, all kinds of different resources out there for parents and young ones. Reporter and getting a lot of positive response about some apps. These are some recommended. The first one is called stop, breathe and think. The second one, settle your glitter. And then theres a very simple one to remember, calm. Com. And smiling minds. And we have listed these online for you, as well. Tomorrow, though, we are focusing on stress management for high school students, and you can catch up on our series on less stress in our nbc washington app. All you have to do is search less stress. Pat . Alrighty. You that major messup on live tv. You did see it. The biggest mistake in oscar history. La la land almost didnt win. We show exactly where everything went wrong. Reporter from the moment Warren Beatty opened the envelope, it seemed something was wrong. After reading the card, he even looked inside again, apparently puzzled by what he saw. The Academy Award [ laughter ] for best picture reporter he then handed the envelope to faye dunaway. La la land. Reporter seconds later, you could faintly hear the duo whisper. Look closely at the envelope the presenters were holding. It says actress in a leading role. Two minutes later the plot thickened as the team from la la land delivered acceptance speeches. Award show staff rushed the stage, grabbing the envelope horowitz. When they opened the envelope, it was clear there was a problem. Reporter you could see stones reaction when the correct envelope surfaced. Also on stage, brian cullen and martha ruiz, the only two people who knew the results in advance. The Accounting Firm tells nbc news, it was cullen who mistakely handed out the wrong envelope. And there are new questions this morning about whether an illtimed tweet could have been responsible. He tweeted this picture with emma stone with her oscar backstage. He has since deleted that tweet before the show, they were on the red carpet, each carrying a briefcase with a complete set of winning envelopes. They have both done this in previous years and in an interview said they stand on opposite ends of the stage and actually memorize the results in case the wrong win we would go directly to the stage manager and let them know there is a problem. And they would make a correction, probably right then on stage and do it live. Reporter but pricewaterhouse scooper says on sunday once the error occurred, protocols were not followed through quickly enough. There is a mistake. Moonlight. You guys won best picture. Reporter la la land horowitz set the record straight. This is not a joke. Moonlight has won. Reporter its a black eye for pricewaterhousecoopers. The firm says we sincerely apologize for the error that was made. An error that may have been the result of a tweet. Right . Something as simple distraction like that. Wow. Well, its been the warmest february on record, distracting and just nice. Take a look at this. Whates blossoms . Will they bloom early . Deve got the come up with your game plan now. Get ready for the crowds. The Cherry Blossoms are just weeks away from blossoming. And tomorrow we are going to find out exactly when theyre supposed to hit peak bloom. That is when at least trees around the tidal basin are blossoming. Its a gorgeous sight but also means plenty of tourists in town. This year the festival begins on march 20th. Ive got a bittersweet relationship when i see a lot of blooms like that. Because theyre so beautiful. But we talked about it people who battle severe allergies. Its awful. Its interesting to see when they actually peg that date. The earliest the Cherry Blossoms peaked was march 19 in 1990. Were going to be in the 80s tomorrow. Well, some areas. Where are we going today . Today were going mid to upper 60s. Still very warm. Were going to be a good 10 degrees warmer than we were yesterday. Tomorrow a good 10 to 15 degrees warmer than today. We keep moving the temperature up. We will have some cooler weather headed our way. Now thats after we make a run at that 80degree mark. And after we see some thunderstorms moving into the march 1st . Hard to believe. Current temperatures out there right now, right around that 60degree mark. It is mild out there. Were going to top out in the mid to upper 60s today. Most of the day is going to be dry and then we get into the afternoon. Thats when we see showers pushing in from the west and moving east. Were already starting to see a few in west virginia. You head over a little west through centralwest virginia, it is hitting the ground. This will move ove