he says they're worried, as health teams set up the quarantine site, folks in fairfield say they hope the coronavirus scare passes soon. >> keep things isolated. i'm not too sure, but that's all we can hope for. >> reporter: again, we're told that quarantine will pose no risk to the public. in fact, members of the centers for disease control and health and human services will be the ones that will provide services and come in contact with those travelers. again, who are due to arrive here tonight. we are expecting more details at a press conference tomorrow. reporting live at travis air force base, i'm jody hernandez, nbc bay area news. >> okay, jodi, thank you so much. and nbc bay area has learned five employees at good samaritan hospital in san jose are being kept at home because they may have had contact with a patient who has coronavirus. the man visited good sam e.r. on january 28 and became the bay area's first confirmed case. the hospital says he was wearing a mask during his entire visit. in a statement good sam said upon valuation and treatment and consultation with the santa clara county public health department, it was determined he should self-isolate at home. they told employees to do the same until february 11. >> we treat health care providers with a little bit more assertively because they're in a health care setting. they would be both at an increased risk of getting infected from a patient and they would be at an increased risk from spreading to a patient. we're following cdc guidance on how to handle those situations. >> the hospital ceo sent this email to staff saying the health department recommended several other employees who may have come in contact with the patient. they're okay, and to keep working. santa clara county has two confirmed cases of coronavirus. both those patients are recovering at home. >> s.f.o. is one of the many airports where the airlines are cutting flights to prevent the virus from spreading. this is a live look now at s.f.o. health experts say the next couple of weeks are critical in terms of containing the virus here in the united states. nbc bay area's lili tan joins us now with the protocol. lili. >> reporter: one way to stop the spread is to stay out of hot beds of infection. we've seen this in a number of flights at s.f.o., flights to and from china have been cut in half. s.f.o. officials say in the coming days they expect chinese airlines to reduce the number of flights to the u.s. as well. at san francisco international airport, it's not business as usual. travel restrictions are so far slowing the outbreak of coronavirus, now known as not 2019-ncov. >> typically this year there are 90 flights from s.f.o. to china, that includes hong kong. right now what we're looking at with reductions is a 50% reduction in flight activity. we're down to about 45 flights a week. >> reporter: the airport commission met this morning about the continued cdc presence at s.f.o. new border protection policies that went into effect on sunday mean passengers can expect temperature checks, questions as to where they've been traveling and about an hour wait to get through this process. >> sucks that it's not hugely contagious, with you it is transmissible. >> reporter: infectious disease specialist kathleen jordan says coronavirus is spread person to person. >> within 6 feet of someone, maybe breathing air of the droplets, but also hands touching surfaces that may have been contaminated by droplets from someone. >> reporter: dr. jordan says the next couple weeks in the u.s., containment will be critical. >> i'm hoping that our health department has the test available locally. that would really help in containment. >> reporter: minutes ago i spoke with a woman from beijing who said it took her about three hours to get through customs. it should be much shorter for u.s. citizens and permanent residents and take even less time starting this friday after united eliminates all flights from mainland china. live at s.f.o., lili tan, nbc bay area news. >> thank you. the information is changing by the hour. that includes this map of all the confirmed cases. you can find it at nbc bay area.com. well, chaos in the caucus, the delay in results from iowa's caucuses has frustrated candidates, voters and the democratic party. with just 62% of the total released, pete buttiegieg leads in the delegate count with 27%. bernie sanders is close behind with 25%, elizabeth warren 18% and joe biden 16%. election officials say the app that was supposed to transmit results failed, forcing a hand count of votes. frustrated candidates are now moving on and they're in new hampshire without the official findings that could help them with donations. >> we wanted to see those results last night so that we could address our supporters with a firm official count in hand. >> so i think the people of iowa have done their duty. unfortunately, i think the democratic party here in iowa has been negligent in not getting us timely results. >> well, coming up our business and tech reporter scott budman takes a closer look at the technology and what went wrong. that's coming up in less than ten minutes. >> not just the mess in iowa. this is a big night in politics. in less than an hour president trump will deliver the state of the union. this will be his fourth address to a joint congress. let's take a live look now at the capitol building, almost 9:00 eastern time is when it will start. senators and representatives are now filing in. also special guests. the president is expected to layout his reelection campaign, his theme, the great american comeback. mr. trump playing the highlights of strong economy, in his words, military spending and his conservative judicial appointments. now, you can watch the address right here with us on nbc bay area. lester holt will anchor our special coverage beginning at 6:00 p.m. the bay area will be well represented at the state of the union. congresswoman barbara lee is taking sh taki taking sherry hirota. >> health care saves lives, it saves money and it's good for the country. >> other guests include jethro moore, from the naacp from silicon valley. from the east bay maria isabel, the woman from concord who testified she would die of a genetic disease if she was deported back to guatemala. >> it is cold out there. take a live look at our traffic cameras across the bay area. a beautiful day, but it is chilly and sometimes chilly. chief meteorologist jeff ranieri explains that some places dropped to the 20s. >> we had 20s, 30s, and we also had 40s. wind has a big impact on cold temperatures. we wanted to start off with this to explain why we had such a big range in temperatures this morning. the interesting thing is all of the bay area had the same amount of cold air from the north bay down to the south bay. but the interesting thing when it comes to cold air is when you have wind mixing in. and where you don't have wind mixing in, there are some big differences. right across the north bay where it was wind sheltered, not a lot of wind we were able to drop down to the 20s and 30s. where we had the wind picking up, that air gets mixed around. there is a little friction that's created and it can't become as cold. so any time you have wind, you will never see temperatures get quite as cold as they could be. so for the south bay where there was some wind we had a mix offer 30s and 40s. let's look at the temperatures. 25 mount saint helena, 27 mount diab low. 27 degrees. we had 27 despite the fact it was gusty. a wind at 55. so if there was no wind, based on what we just showed you, the science behind cold weather and wind, we could have had feels like temperatures minus 10, maybe minus 15. so very cold morning up here across mount diab low, and we're going to have details on our extended forecast and rain outlook coming up in 15 minutes. >> thanks so much, jeff. another great resource for weather conditions, jeff's twitter feed. you can follow him, his handle is at jeff ranieri. >> tonight we're hearing from one of the passengers who was on that greyhound bus when the shooter opened fire. mark says the real hero wasn't the bus driver, but another passenger who wrestled the gun away during that terrorizing attack that happened yesterday. nbc bay area's mark matthews just finished talking with that man and joins us now from the greyhound bus terminal in san francisco. mark. >> reporter: raj, it was a terrifying scene described by a man who actually sat in the line of fire. you're right, he says the stories you've heard about how the bus driver calmly talked the shooter off the bus, well, that didn't happen at all. >> he was speaking to himself like mutt erring things and just speaking incoherently. >> reporter: mark of anaheim says the gunman identified as 33-year-old anthony williams of maryland suddenly stood up gun in hand. >> and then was saying, you don't know me like that. and then he stood up and said, [ bleep ] you, [ bleep ] all of you. and then that's when i heard the sound of the gun caulking back. >> reporter: he said it sounded like eight or nine shots. >> it seemed to go on forever. i was hoping he would run out of bullets. at the same time, you're waiting for a bullet to hit you. >> reporter: six people were hit. one fatally. and more would have died, he says, except for a passenger who acted before the shooter could reload. >> he managed to get the gun off him. the gun must have landed under the seats. he panicked and ran off the bus. >> reporter: the fourth man from the left with his thumb raised is the passenger who jumped the gunman. >> everyone hugged him and thanked him. i had an opportunity to ask him for myself, did you wrestle with the gunman, get the gun away? he said he did. i said, you're a hero. thank you for saving our lives. >> reporter: he says growing up in england, he was always fascinated by news reports of mass shootings in the u.s. >> you go through these scenarios where you think you're going to be the hero when it happens. like you just want to hide from it. >> reporter: he says the driver of the bus didn't even know that there was a shooting on board. he says he told passengers that it was maybe a sound of the engine having trouble, and that's why he pulled over. come here, let me show you something. this is a greyhound bus. there is a plastic barrier between the driver and passengers that you may be able to make out just inside that window. drivers have told me it makes it very difficult to hear what's going on behind that barrier where the passengers are sitting. reporting live from san francisco's bus terminal, mark matthews, nbc bay area news. >> very interesting. good reporting. thank you, mark. it's a sign of the times now and hurts a lot of families. nearly a thousand macy's employees are out of a job. 831 to be exact. 831 workers at the macy's.com division will be laid off between april and august. the employees work at this office on folsom street in san francisco. the move comes as macy's plans on closing 125 stores over the next three years as it tries improving its online presence. macy's will move its tech operations to atlanta and new york. >> still to come, getting rid of graffiti. the penalties people in the south bay may soon face if they don't clean up their property. >> this blew us away. >> this video of a coyote and a badger going viral. it shows something never seen before in the bay area wilderness. >> and after that cold start, high pressure is going to warm it up. we'll let you know how much hotter it will get this week. a look at our rain outlook. i'll have that in about 7 minutes. over the last 24 hours, technology took center stage in the iowa caucuses, but not for the right reasons. an app meant to speed things up slowed everything down. now some are asking if today's technology is capable of helping the election process. let's bring in business reporter scott budman. scott. >> janelle, the idea of streamlining voting has been -- for years. when iowa used an app, things did not go well. now people are rethinking their app-related plans. at the heart of the delays on caucus night in iowa, the reason it was the top trending topic on twitter, an app. built to manage the political chaos, the app from a colorado company called shadow was made to streamline the caucus process, but couldn't properly handle and deliver the data. so they went back to the old-fashioned phone-in results. >> apps need to be thoroughly tested and vetted for security and for bugs. >> reporter: the ceo of blue hexagon security, he said an app that isn't properly vetted is dangerous, especially when it comes to privacy. >> it's very easy to lose data with your phone. so that's another area where you have to do additional testing and verification before you launch an app. >> reporter: here in silicon valley we talked about online and app voting for years. but -- >> cyber security, you are as strong as the weakest link. >> reporter: san jose state internet professor ahmed says we're probably not ready yet. shadow agrees, and went on twitter to apologize for iowa. >> there's a lot of work we have to do before we can say, yes, we have to go to the app. >> reporter: now, we have another caucus coming up on february 22nd. that one is in nevada. nevada has already said it won't use the same app, but it may use another one. we'll keep you posted. back to you. >> okay, thank you, scott. putting a big target on tagging, san jose is considering a stronger policy when it comes to removing graffiti. once the city gets two complaints are vandalism, it notifies the property owner. they say the grace period to paint over the graffiti is too long. they want to hit them with a $250 fine if they don't act right away. >> this effort to identify the best manner we can achieve the ultimate goal is to remove graffiti from private property as quickly as we can. again, the overall goal to reduce the visual blight in our city. >> if it is approved, the new policy will take effect immediately. >> a remote wildlife camera near gilroy recorded something truly wild. unlikely friends, a coyote in front of a culvert enticing his friend, a badger, to hurry up. let's go. as they walk under a freeway. it has recorded skunks, raccoons, bobcats on some 50 cameras. as the nonprofit studies how animals coe habit with free ways. the coyote/badger interaction is special. >> this blew us away, you know. this is the kind of footage folks study these things, work on issues, we dream of this. this kind of interaction. there are studies out there, colorado, other places, also native american accounts of badgers and coyotes hunting together. >> there are also places where larger animals like deer, they can also walk under the roadway. the goal is not to just protect wildlife, but to connect habitats to strengthen the eco system. >> okay. jeff ranieri with us now. we are all reunited back together again. >> hey. >> feels good, raj. nice to have you back. >> i almost didn't come back. >> now you're like -- >> you wouldn't do that. >> miami is a beautiful city. they did a great job hosting the super bowl. and the weather -- i know you grew up in florida. tornado watches, rain, humidity, i'm exhausted. glad to be home. >> rain system, doppler radar. >> if there was humidity, you would have changed your mind. >> it was fun to see your reports down there. back here in the bay area, we have some very cold dry air in place. that did start us off with some 20s, 30s and also a few 40s. as we get a look now, the cold blast of air that sunk our temperatures down this morning is starting to slide a little bit more off to the east, and that will start to change as we move through tomorrow. it's basically going to make way for this area of high pressure to move in. and it's going to shove that coldest air off to the east. so we are looking at a gradual warming trend as we head throughout the next couple days to thaw us out a little bit. that will be nice for us. as we move through tomorrow, though, it will be cold to start, but just not as cold as it was this morning because of that area high pressure building in. makes sense, right? over here to the south bay, i have you at 38. peninsula 39. little bit better for you in the tri-valley at 37. still some sweater weather, jacket weather in place as you move through tomorrow. 36 in the east bay and the north bay also starting off with a chilly 36. as we move through the day tomorrow, numbers warming up by about 3 to 5 degrees. enough to put us in the 60s. beautiful weather. low humidity, sunshine, 60 in downtown san jose. for the east bay we are also putting it back in the mid 60s for pittsburg, i have you at 64. danville, oakland 62. winds relatively light at 6 miles per hour, sunshine for palo alto, 62. san francisco, we're keeping it in the 50s from the embark dare owe through the engel side. north bay, 64 in napa, 62 santa rosa. 60 for mill valley. so we're gradually starting to move up and i think the area high pressure is really going to kick into high gear once we hit thursday and friday's forecast. it's going to move right on top of california and that will bring back some mild weather. i think the impacts here in san francisco will be pretty minimal, only some low 60s by friday and saturday. beautiful weather for the chinese new year parade on saturday's forecast. might get into a little bit of trouble sunday with wind gusts 15 to 40, and we're dry over the next seven days. inland valley temperatures, we're a little bit warmer there for the mornings. by friday 40 and 68 for the afternoon high. looks beautiful. i know some of you want some rainfall. watch this map, though. i did want to give this to you. and you can see as we head through the next two weeks, high pressure is really pushing a lot of that storm activity off to the north. we'll keep an eye on it. we're getting a little bit desperate but there is still hope february and march. >> if it's humid in miami we just sweat a lot. >> go from your front door to the car, why did you take a shower? >> it's good to be here. >> gorgeous, though. thanks, jeff. >> up next here at 5:00, a chance to name a street in the east bay. that's kind of cool. we have some of the most outrageous names suggested and a look at the ones that made the short list. so maybe we're new to home improvement, but we got an insider tip on the ultimate flooring destination. we're shopping alongside real-life designers and contractors. and, these prices! yeah, we found where the pros go. explore floor and decor in person or online. car burglaries continue to be a major problem in san francisco, especially in tourist areas. plain clothes officers for sfrmt f.p. s.f.p.d. spotted these men at the palace of fine arts. they didn't arrest them because of safety risks. they followed them to the golden gate bridge welcome center where they broke into three cars. when finally confronted, they were caught. more than 40 pieces of stolen property were recovered. >> sold tonight, one of san francisco's most iconic buildings has a new owner. last year the transamerica pyramid went up on the market the first time ever. new york developer michael shaveau bought it. just over $700 million. it was built in 1972. before the salesforce tower it was the tallest building in san francisco. a couple blocks in downtown berkeley are one step closer to getting a new name. back in october the city asked people to come up with a new name for shattuck avenue. they wrote thousands of names on downtown berkeley. some entries, avocado toast street. and old town road, the song by lil nas x. >> yeah. >> the naming committee narrowed it to a short list of ten. prominent figures like the famous architect julia morgan and former politician william byron rum ford. they'll make a final decision next month. i like avocado toast. that's funny. >> up next, a fo