so overall, temperatures expected to be in the 90s to 10 tonight. now the other thing you're probably noticing is bit of smoke drifting in from the fires off to the mainly the heat coe pollutants in the atmosphere. that's what is making it unhealthy over the east bay and the south bay. spare the air alert in effect. coming up in about 15 minutes, we do have a change to the forecast. we're looking at monsoonal moisture. i'll show you when we could now have a slight chance of thunderstorms. i'm back with that again in about 15 minutes. >> all right, jeff. we'll see you in 15 minutes. thank you so much. for more on the heat and risks, nbc bay area's velena jones is live in concord where the heat has triggered a safety slowdown for bart. this means it's going to be affecting riders. >> that's exactly right. if you're riding the bay point lines or the dublin line here at

bart, that commute may take you a little longer. that's because bart has now slowed down their service after temperatures rose over 100 degrees to try to prevent and avoid a potential heat-related derailment. now meantime, climate experts say we need to start expecting more frequent heatwaves as the planet continues to heat up. >> we're sweltering for sure. >> reporter: sweltering sun and triple-digit temperatures. that's the trend we need to start expecting here in the bay area. >> i've been playing tennis since the age of 6. and i got to say, this is one of the hottest summers that i've been facing. >> reps the rt hit the brakes on some of its east bay lines, slowing trains to 44 miles per hour or less to prevent potential problems in the heat. all part of the agency's new policy after tracks warped in triple-digit heat in june, triggering a minor derailment. stanford professor noah

divenbock says we should expect the frequent heatwave shows the up more frequently. >> not only is the globe warming, but california is warming as well. and in particular, the frequency and intensity of severely hot conditions is also going up. >> reporter: diffinbaugh says even the best efforts to slow climate change won't be enough to turn the temps back down. >> even if we achieve the goals that have been set out such as reaching net zero emissions by 2050, even if that world, that's more global warming than we've already had, and even then we'll need to adapt if we want to be resilient to severe heat. >> we don't expect 100-degree temperatures in march and april, but that's what we're dealing with now. >> reporter: the trend of more heat more often means a nearly year-round fire season that is stretching resources. >> we're adding crews all the time. we're adding more and different

kinds of aircraft, larger aircraft. >> now for firefighters, the question is what do we have to do differently to deal with it? >> no way we're going to reverse it. it's only going to get worse. we just have to adapt. we have to build -- we have to build resilient communities. >> reporter: now back here at bart, slower service is expected to last on those two east bay lines until 8:00 p.m. now yes not sure if they're going to continue that throughout the week we will continue to keep in touch with them. but for now here in concord, velena jones, nbc bay area news. >> thanks for the heads up. appreciate it. take a look at this. the heatwave created problems for hikers in the east bay. a rescue team was on scene at the huckleberry trail in the oakland hills this afternoon. sky ranger was overhead. firefighters say three hikers were suffering from heat exhaustion, but after being evaluated by medics, the hikers were able to walk back down the

trail on their own. with the hotter weather, there comes a bigger risk of fire danger. crews were able to put out the eden fire in dublin this morning. you'll remember we brought that story as breaking news during this hour yesterday. car fire spread to an open field. the flames came very close to homes near eden canyon road, forcing evacuations. thankfully, firefighters saved those homes, and you can see by the video just how close those flames got to them. people were able to return home after a couple of hours. in total, the fire burned 58 acres. download our nbc bay area app if you want to have access to up-to-the-minute forecasts in your neighborhood. all right. parents, as our kids head back to school, every district and you as well have an extra decision to make that is whether to have your children wear masks. just last week, the cdc updated its guidance, you might remember, only recommending masking indoors and schools if the community is at high levels

of transmission. one of the reasons, the cdc says nearly 80% of kids in the u.s. have already had covid-19. and around 95% of the population already has some immunity either through vaccinations or prior infections. let's take a look at the bay area now. you can see here that the majority of counties are still in that high transmission level. and you can see them. they're all in the orange right there. marin, san francisco, sonoma and santa cruz are in the medium transmission tier. they're the ones in yellow. as we've been reporting, while most kids across the country will return to the classroom without being required to wear a mask, that's not the case for kids in two south bay school districts. when they walk into the class, masks are required. nbc bay area's damian trujillo joins us from alum rock with a look at how the mandate is being received this first week of school. >> alum rock and franklin-mckinley say they have the authority to implement their

own health rules. the pandemic has hit them very hard and say they can't start the school year by taking a chance. on the second day of school, franklin-mckinley superintendent is making his rounds, welcoming these kindergartners who are all wearing masks in class. here the mask requirement will stay in place, at least for the next few days. >> we'll revisit that next week, as we get the results this week of everybody testing. all students and staff receive rapid home testing kits before school starting. >> reporter: franklin-mckinley serves one of the communities hit hardest by covid so the superintendent says that's reason enough for precaution. most parents applaud the move. >> masks are a good idea because the infection levels are still high in her neighborhood. but in alum rock, where masks are also mandatory, maria alvarado says she's fed up. maria says she is irritated by the mandatory mask rule on this

first day of school. the superintendent also says she had no choice, noting she had to fill several classrooms with subs on day one because some of her teachers just tested positive. it's still an emergency in alameda? >> yes, it is an emergency. >> reporter: the district says it will monitor the data frequently to decide when it can lift the mandate. >> when there is a fire, when there is an earthquake we have the authority to implement certain measures to be able to keep people safe. this is no different from that. >> reporter: maria says she understands that rationale. and although she hates the mask, she supports the mandate. to keep her children from getting infected, maria says she is all for the requirement. damian trujillo, nbc bay area news. >> all right, damian, thank you. meanwhile, students in petaluma city schools returned to the classroom today. masks are not required there, but are strongly recommended. spotted a few kids wearing masks, and doctors say families

should consider their risk factors when deciding whether to mask up their children. another exposure scare of legionella bacteria, this time in the south bay. right now the spa at the aloft san jose cupertino hotel is closed while crews decontaminate that area. the santa clara county department of environmental health launched an investigation at the hotel after getting a complaint in early july. specialists found the presence of legionella in samples taken from that spa. the spa will not reopen until tests come back clean. bacteria can lead to legionnaire's disease. it's a type of pneumonia with symptoms including cough, shortness of breath, fever, muscle aches and headaches. the county has recorded nine cases so far this year. in oakland, fire crews were able to quickly knock down a fire that burned an rv to the ground. take a look here. you can see firefighters hosing down hot spots in that area during the aftermath of the destruction. this is in front of a homeless encampment near wood and 26th

street. firefighters say no one was hurt or displaced by this fire. all right. still so many questions tonight after a deadly car crash over the weekend. a mother and her three children were killed. it happened at around 8:00 sunday night on highway 156 near hollister. chp investigators say the mother veered into oncoming traffic and ended up hitting a big rig. the family from carmel valley died at the scene. the children were 12-year-old ben and 14-year-old twin sisters lee and lucy. >> a big part of my life is just gone now. who am i going call when i'm having an issue? they were taken way too soon. >> grief counselors have been sent to carmel middle school to help students cope with the loss. the family says the mother was driving an older model tesla that was not equipped with the self-driving mechanism. the chp says the investigation

is active. investigators would like to hear from anyone who may have witnessed this accident. well, it sounds chilling. imagine a car crashing into your property, maybe even into your home. one san jose man says that's exactly what's happened to him 23 times. he lived on jackson avenue in east san jose and says something's got to give. nbc bay area's marianne favro is life where she says the man's property has been a crash pad for years. >> reporter: after one time he hit the mailbox so hard it flew into a neighbor's backyard. he had to get a reinforced one. >> every two years we get a car either tears up my fence or goes through my house. >> reporter: ray minter says in 2016, he woke up to this after a speeding truck slammed into his parked car, pushing it into his house. >> i heard like a rumble and the house started shaking. and at first i thought it was an

earthquake. and then i tried to come up in the front, and there is the car, the truck's bumper and everything is in there. the whole front end of the house is all caved in. so i couldn't come out. >> reporter: it wasn't the first time and wouldn't be the last. >> it's like 23 times of actual damage. >> reporter: that's right. 23 times a vehicle has collided with his property on jackson avenue in east san jose since 1964. and the damage has added up. >> i've lost three cars. >> reporter: ray says most of the crashes have involved cars speeding off the highway 680 offramp. he says in one case, a car went airborne and plowed into his garage, where his dad had been sitting just minutes before. but he says despite the years of close calls, no one in the home has ever been hurt. ray says he has reached out to the city and state, asking them to put up more barriers. the city of san jose says it's applied for millions in grant

money for safety improvements. >> one of the land medians down the middle of the street, that tends to slow down traffic, make it calmer, prevent dangerous left turns into and off of the street. and the other is a raised separated bikeway. >> reporter: but those projects could take ten years to complete. we also reached out the caltrans to ask if they have any plans to help, but have not heard back. for now ray just hoping his reinforced poles and fence willing keep the cars out and his family safe. in san jose, marianne favro, nbc bay area news. >> all right, marianne, thank you. coming up, how uc researchers are using cats to learn more about the long-term effects of wildfires. and an oakland nurse is on a mission to save the lives of children all the way across the world in tonight's bay area proud. we'll hear how one boy in uganda helped inspire it all. and yes, it is hot outside. plenty of triple-digits across the inland valleys. going to stay warm tonight with

plenty of 90s and we're watching some monsoonal thunderstorms bring thunderstorm chances closer to the bay area. closer to the bay area. i'll have a look at all californians have a choice between two initiatives on sports betting. prop 27 generates hundreds of millions every year to permanently fund getting people off the streets a prop 26? not a dime to solve homelessness prop 27 has strong protections to prevent minors from betting. prop 26? no protections for minors. prop 27 helps every tribe, including disadvantaged tribes.

prop 26? nothing for disadvantaged tribes vote yes on 27. welcome back. uc davis researchers are teaming up with cats to learn more about the long-term risks of wildfire smoke. researchers have been evaluating cats who survived big wildfires in 2017. they found many of them had serious heart problems, including congestive heart failure, swelling, and blood clots. but there is good news. veterinarians say these heart conditions can be cured and even reversed if treated properly.

researchers are hopeful the study will provide insight into potential human ricket risks as. turning to our bay area proud series and the story of an oakland nurse on a mission to save the lives of children a world away. garvin thomas is here to hear the story. i understand it was one boy that inspired all this. >> one boy who inspired it all. kayla billington grew up in a small town of wisconsin, like 200 residents small. she says she always knew she wanted to get out and see the world. knew it would make her a better person. what she couldn't have guessed is how she would end up making the world a better place. at kaiser permanente oakland medical center, in too neonatal intensive care unit is where kayla billington works as a nurse. it require herself to do a million different things, all with the goal of a single thing. >> heart rate, respiratory rate. >> reporter: saving children's

lives. >> most of our babies are on oxygen. i just get so much joy out of giving children the opportunity to be children. >> reporter: this story, though, is about what kayla does when she's not working at the hospital, which it turns out also involves saving children's lives. it begins, however -- >> he kind of just steadily started to decline. >> reporter: with a life kayla could not save. >> it really sunk into me that what was happening. >> reporter: kayla knew she wanted to be a nurse since she was a teenager and survived a cancer scare of her own. she graduated college and was soon drawn to travel nursing. kayla would work a few month contract somewhere in the u.s., then see the world with the money she earned. she started out as a tourist, but the more poverty and hardship kayla saw, the more she wanted to help. which is how kayla ended up volunteering at a hospital in uganda the day a sick 1-year-old boy named patrick came in. >> i just pretty much fell in

love with him. we just like became the best of friends. >> reporter: because of kayla's nursing experience, she knew right away that patrick had a heart condition. what she didn't know was that in uganda, diagnosing it would be hard. repairing it impossible. >> and man, i was devastated. i could not sleep after that. i would see patrick every day and just think like there's no way i can let this kid die. and without at least trying to do something for him. >> reporter: kayla spent the next year fighting to get patrick to the u.s. and to a hospital that would donate his surgery. the pair eventually making it to a hospital in kentucky, but by then, patrick was too sick to survive the surgery. >> about three days after we left the hospital, he just very peacefully died in my arms at our house. and while he was dying, i made him a promise i was going to make sure that his life had

meaning. >> reporter: paty's project is how kayla is now delivering on that promise. she started a nonprofit that identifies children in uganda needing life-saving heart surgery, and then paying to fly them out of the country to get it. it does not, of course, bring patrick back, but it means a boy who was on this earth for such a short time will have a legacy that lasts much, much longer. since patrick's death, kayla has been able to make three life-saving surgeries happen and has identified the next two to get their surgeries once she has raised the money. obviously a very sad story, but very touching. the first child that she was able to save is patrick's sister. >> oh, my gosh. >> she returned to uganda and identified in patrick's sister his condition and got the surgery for her. so i said she made a promise to make his life matter. she made two promises. the other was to take care of

patrick's family. so she first thing she did is save his sister's life. >> thank goodness for people like kayla. incredible. garvin, thank you for that story. appreciate it. okay. waterworks here. what's going on, jeff? >> we've got the heat. i know, that story is so touching. and that hot weather is going to continue in the forecast as we move through tomorrow. then we are going to get some changes in here. let's go ahead and get a look, and you can see out here across san jose, there is a little haze off towards the distance. that's some of that air quality that's keeping it unhealthy through the south bay and also the east bay. i know the system it can sneak up on you. make sure you're drinking plenty of water. the old adage here is if you're feeling thirsty, you're usually some sort of hydrated. so have that water with you. also wearing a hat can help. a cold towel on the back of your neck if you're spending extended times outdoors. can also lower your core body temperature. spf, don't want to forget that. and remember those pets.

let's get you outside here to livermore. this has been one of our hottest locations up to 106, which makes it the hottest day of the year by far. last time we got anything close to 106 was back in the first day of summer, which was 102 degrees. it's going to be a slow drop off here. we're going get to the nines through 6:00 and 7:00. look at this, 80s through 8:00 and 9:00, and 70s later on tonight. so if you happen to not have air conditioning this evening, it's uncomfortable, find some way to stay cool, call a friend, hit the movies up, maybe head out to do some sort of shopping. do a little window sightseeing for you. here is the pattern. hot high pressure sitting across the desert southwest. that's bringing in the heat. it's also pushing in monsoonal thunderstorms over the sierra. it now looks like new update today, we could see a little bit of this slide closer towards us, and we also have this area of low pressure offshore. a whole lot happening here as we roll through tomorrow.

i want to take you through our forecast. tonight at 11:30, fog at the coastline. watch to the south and you'll see how the clouds bubble up with thunderstorms over the central valley. tomorrow morning, also near the coastline. we're going see the chances move real close. so we have a slight chance tomorrow morning to see some thunderstorms. also mixing in with some of the fog and drizzle at the coastline. so quite a dynamic complex situation moving into our forecast tomorrow. definitely going to feel strange with humidity pushing in. temperatures are going to start on the mild side, 60s to low 70s. you can see over the north bay 69. north bay at 66. daytime highs for tomorrow. they drop off a couple of degrees. it's still going to be hot. 100 here in morgan hill. over to the east bay, low 100s, antioch to pleasanton. through the peninsula, not too bad. 85 in redwood city. san francisco, 70s through downtown and off to the north bay. 94 in santa rosa. 82 in mill valley. seven-day forecast does show in san francisco we drop it off through this you coming weekend. and for the inland valleys,

we're also going down by sunday we are at 88 degrees. so we'll be watching out for those thunderstorms. we'll have that radar going tomorrow morning. >> thank you so much. all right. still ahead, how a local artist is helping spread some joy through her large scale works in the south bay.

new today, layoffs at apple. bloomberg reports the tech giant has laid off 100 contract-based recruiters. the move is described as a way to slow hiring and spending. apple isn't commenting at this time. word is not all the contractors were let go, and that apple is still keeping its full-time recruiters. apple isn't the only company slowing down hiring. microsoft, amazon, meta, tesla,

and oracle have all slowed or cut back, grappling with inflation ahead of a potential economic downturn. as millennials migrate to san francisco, new data is revealing the top places where they're actually coming from. according to numbers from the u.s. census bureau, 1 in 20 millennials living in san francisco were living in los angeles as teenagers. about 3.5% were in sacramento at the time. and about 3% you see right there left san jose for the city by the bay. meanwhile, looking outside of california, about 1% of millennials living in san francisco traveled from seattle, chicago, boston, and new york city. well, south bay neighborhood is getting some added color and flare. look at that. pretty nice. developers at republic urban properties are moving into a new headquarters in willow glen on lincoln avenue. the company will share the building with a new restaurant,

poquita. >> the climate for developers post-covid is tough. costs are high. what we try to do is maximize the beauty of the building. that creates additional value. >> it's always tremendously rewarding to add to my city. i'm from here, and i love being able to be a part of how people walk around and experience it. >> depicted in the mural is mexico's historic city of san miguel de allende. miguel de allende. a calnia officifore californians have a choice between two initiatives on sports betting. prop 27 generates hundreds of millions every year

to permanently fund getting people off the streets a prop 26? not a dime to solve homelessness prop 27 has strong protections to prevent minors from betting. prop 26? no protections for minors. prop 27 helps every tribe, including disadvantaged tribes. prop 26? nothing for disadvantaged tribes vote yes on 27.

cops usually have a prime suspect, right? in this case, it's a primate suspect. the san luis obispo sheriff's office believes a capuchin monkey called 911 on saturday night. well, apparently picked up the zoo cell phone, which was in a golf cart, started pushing numbers. and it just so happened that it was the right combination to call police. zoo officials say capuchin monkeys are very inquisitive and will grab anything.

so how do we even know it