In the heat, she questioned why pg e decided to cut power to roughly 1400 customers in napa and Sonoma County. There hasnt been anyone here and its one of the hottest days of the year. I hope they get it on right away. Reporter 87yearold fern says her breathing machine stopped working when the power went out around 4 00 a. M. I dont have any air thats blowing in. Reporter pg e chose to do a Public Safety power shutoff because of weather conditions that created a wildfire risk, something Kevin Bachmann understands because shea victim of the tubbs fire. I was one of the several thousand homes that burned down in north santa rosa. Reporter calistoga mayor chris canning says preemptive fires are the new normal, and the city is prepared with generators which were not needed this time. If we did end up with a total shutdown, those generators would have been able to power about 2 3 of the community. Reporter by mid afternoon pg e began the process of restoring power, but warned it could take time. We start patrolling the lines, inspecting the lines by foot and in the sky. Reporter so it really was a race against the clock. Pg e said crews needed to get this work done before the sun goes down. It looks like they will, though. Pg e expects Sonoma County and napa county, whoever had the preemptive power outages, they expect them to be back up by tonight. Reporting live from calistoga, ali wolf, nbc bay area news. Okay, ali, thank you so much. Lets take you out live now to walnut creek where it is starting to cool down as that sun sets. Chief meteorologist jeff ranieri is tracking our changing weather. Jeff . And very, very slowly, those numbers are starting to drop. The official numbers are now in, and one of the hottest day was santa rosa at 105, smashing the old record of 98 degrees. Concord a new record at 99. San francisco, 94, beating the old of 93 set way back in 1954. San jose, 99. That is also a new record. So where are we right now with the temperatures . Slowly beginning to drop. 93 in napa. 85 in San Francisco. And 96 in san jose. I want to get a closer look at the ocean breeze. It is moving out of the west at 18. So this is also beginning to bring some changes. Its not very large right now, but you can see in San Francisco to oakland, were 1 to 2 degrees cooler, and that is just the indication here that the ocean breeze is beginning to pick up. Now through tomorrow, not quite as hot. 11 00 in the morning, were in the 70s to 80s. Well talk about this cooling system and how much it drops temperatures over the next couple of days in about 15 minutes. Okay. Well see you soon, jeff. Thank you. Jeff is going to be tracking the weather all night long on all our digital platforms. He tweeted out about what the models are showing about rain. Make sure you follow hy hymn jeffranieri. Tonight the man accused of starting fires sseral charges. Investigators arrested 68yearold Freddie Graham on monday. They say the missouri man is responsible for starting the fires last friday and saturday. A witness spotted the suspect on friday, and on saturday, firefighters also saw the suspect. Same area. Graham is now facing 13 counts of arson and starting fires during a state of emergency. A majority of House Democrats say they now support some kind of impeachment of President Trump. Thats according to an nbc news tally. But that doesnt mean they will vote to impeach the president. Some House Democrats are asking for an impeachment inquiry to examine any evidence of wrongdoing. House Speaker Nancy Pelosi announced a formal impeachment inquiry yesterday. It all stems from a phone call between President Trump and ukraines leader and claims that ukraines president may have been pressured by President Trump t iestiga joe biden and his son. Well have a full report on all of this coming up tonight at 6 30. A democrat with his sights on the white house got an eyeopening look at the housing crisis here in the bay area today. Former obama cabinet member Julian Castro was in east oakland. Thats where he toured a growing homeless camp and spoke oneonone with the people who kuehl that home. Here is nbc bay areas melissa colorado. Reporter its a far cry from iowa or new hampshire. We need someone to come out here and deliver water. Reporter today the campaign trail led white house hopeful Julian Castro to a homeless camp in east oakland, homes to dozens of people in rvs, tents, and makeshift tiny homes. We need to put more resources into creating housing for people that need it. Reporter a swarm of cameras and reporters followed the former secretary of housing and urban development as he ducked through fences, walked by heaps of trash and heard the stories of people like this woman who lis her daughter. We need more lowincome housing, not more highpriced housing. I know that we have dire needs out there when it comes to in and so thats why i made this a priority in this campaign. Reporter castros ambitious plan involves giving renters a tax credit to help with rising rent and expanding the Housing Voucher Program to cover more struggling families. Castro says he hopes he gets asked about housing in the next president ial debate. This is a dire need for a lot of americans, and i hope that those moderators ask a question about what we would do. Reporter but whether hell make to it the next debate is up in the air. The dnc announced tougher kriet tear kragh that puts the former san antonio mayor from being shut thought the fifth debate in november. In the latest nbc news wall street journal policastro is behind. Are you concerned you will be able to make it on that stage . Im working very hard to make sure that im good for the next debate in november. Now, Julian Castro is in San Francisco, celebrating a latinon breed. Melissa colorado, nbc bay area news. Melissa, thank you. Fighting the vaping epidemic by using technology. The Redwood City School District is considering a new way to crack down on students who vape on campus. District officials will vote on whether to install Sensor Systems in eight bathrooms at the Kennedy Middle School campus. Heres how it would work. Once the sensor detects vape smoke in the air, it would send a text message to a school administrator. Those sensors are not cheap. Just one of them costs more than 22,000. The district says it is important to get ahead of this problem. This is a process step from the School District to make sure that obviously were taking care of our students. The school board will discuss the sensors at a tonight. Speaking of which, the ceo of juul stepped down today, and the departure comes after nine deaths have been connected to vaping. Kevin burns joined back in teen began he put out today the new ceo, an executive from altria which owns malbrough is stepping in. In a statement he said i have long believed in a future where adult smokers overwhelmingly choose alternative products like juul. Unfortunately, today that future is at risk due to unacceptable levels of youth usage, and eroding Public Confidence in our industry. He says he is looking forward to earning the publics trust. Is the Tech Industry going south . Not in a bad way, but shifting to the south bay . After a migration to San Francisco, several Tech Companies are looking to san jose to expand their business. Maybe even santana row, where one of the Fastest GrowingTech Companies is building. Our business and tech reporter scott budman spoke exclusively to the ceo of splunk about growth, big money, and interviewing a president. Scott . Reporter well, good evening. Splunk is getting a lot of attention, both from the tech world and politics. And as it grows, its doing here at santana row, known for dining, shopping, and now technology. Its not a typical scene for a tech company, but santana row has been a good fit for splunk. Doug merritt is the ceo of the company that stores and collects data. And although its headquartered in San Francisco, its going to build more here, with one building already full, this giant structure opens in march. The environment on san ttana row is awesome. The restaurants, the shops, the walking, the nature, it feels very main city like even though its not in a city. Reporter splunk is on a roll, with a number of employees growing along with its stock price, it Just Announced a 150 million innovation and social fund to support Smaller Companies in the space. While amazon and google and microsoft and other Wonderful Companies continue to get larger, the world needs alternatives. Reporter merritt also recently hosted president obama when he came through the bay area. That lineage of technology being important, data being important, inclusiveness and thoughtful and thorough listening and interaction. Reporter which begs the question to one of the Fastest Growing data companies, can data and politics mix safely and honestly . Hopefully theyre being used increasingly for the better, not for missed information, but for accurate information. Reporter splunk tells us it has lined up at least one company for its Just Announced fund. It says employees will be able to move into the new building early next year. Live in san jose, skod bcott bu nbc bay area news. Up next, a part of mare island goes up in flames. What investigators found that suggests this might not be an accident. Plus ready to react. The reason San Francisco leaders say they need to carry narcotic can. The wind starting to change. A cooler breeze starting to move back into the bay area. Were tracking the changing temperatures and how much it drop, coming up in about eight minutes. So that early retirement we planned. Its going ok . Great. Now im spending more time with the kids. Im introducing them to crab. Crab . They love it. So, you mentioned that that money we set aside. Yeah. The kids and i want to build our own crab shack. Ahhh, youre finally building that outdoor kitchen. Yup with room for the whole gang. See how investing with a j. P. Morgan advisor can help you. Visit your local chase branch. A fouralarm fire in the north bay burns part of a Nature Preserve early this morning, and now fire investigators are looking into the possibility that copper thieves could be to blame. Nbc bay area Jodi Hernandez live on mare island where the investigation goes on tonight. Jody . Reporter terry, the mare island preserve is a much cherished part of the city of vallejo, but this morning ten acres of the preserve burned after investigators say somebody used saws to cut into two power poles. The pole fell into the brush, igniting the brushfire. Reporter Douglas Buchanan shows us the origin of an Early Morning brushfire that burned ten acres of vallejos mare island preserve. Buchanan, who heads up pittsburgh power, the company that provides power to the island, says someone took a saw to two power poles this morning, sparking the fouralarm fire. The wrap of copper wire has a fairly high value to recyclers, anywhere depending on the market 1. 80 to 2. 50 a pound. Reporter buchanans team also discovered seven other down power poles on part of the island that isnt energized. Most of that copper had been stripped away. Its been cut off, sawedoff. Last month they found another power pole cut down. That attempt caused a power outage on part of the island, but no fire. But this time, the poles targeted led to a dangerous blaze during red flag fire conditions. And with 12 volts of electricity running through the lines, firefighters say it could have been deadly. They likely didnt realize these lines are energized due to the portion of the island theyre on. Of course, if they were to have come in contact with them, it wouldnt have just been a fire we were dealing with, it would that arent used any longer, hoping to keep the thieves from returning. Endangered species. Again, a very impnt this city of vallejo. Investigators say theyre doing all they can to try to figure out who is behind the fires. If caught, they face possible arson charges. Reporting live in vallejo, im Jodi Hernandez, nbc bay area news. Jodi, thank you very much. The Climate Change protests continue. Look at this, more than 100 climate activists closed a section of the financial district. They werent just protesting, they were painting. This is at the intersection of montgomery and sacramento streets. The activists painted more than a dozen different murals in front of businesses they say support fossil fuels. The group showed up about 7 00 this morning, left about 5 00 this evening, arrested seven protesters for trespassing after police say they blocked all entrances into wells fargo. A crisis. Thats how one San Francisco suisidemic in the city. Today staff were invited to get trained on using the lifesaving drug narcan. Christie smith joins us to explain. Christie . Reporter supervisor matt heaney says now that hes been trained, he plans to carry narcan in case he needs to help someone who is overdosing here in San Francisco. We spoke with him and came outside and it didnt take long to find someone whos used it more than once. Near civic center, kenny lundsford says he is very familiar with narcan. He has used it to help people who have overdosed. I have, out here in these streets. And they make it easily accessible. Reporter he says that ongoing accessibility in San Francisco is critical, especially now. It goes all the way up, right . That way it hits the charge into the sinuses. Reporter matt heaney invited supervisors and staff for training o h naloxone to reverse an opioid overdose. Its the most deadly epidemic facing our city and its a crisis. Reporter he has called for declaring a Public Health crisis. City numbers show opioid Overdose Deaths jumped by 31 from 2017 to 2018. Fentanyl death morse than doubled. I would ask members of our community to understand what narcan is, to know how to access it, to know how to apply it, if thats something youre comfortable with. Reporter he argues some should not be using these drugs or should be in treatment, but thats not possible if they dont survive. Thats the majority of overdoses that were getting reported back. Reporter heaney believes the city isnt doing enough. The Mayors Office points out all the effective programs, nurse, and outreach workers. Narcan has been distributed here for years. And we want to make sure that people are prepared. Reporter the supervisor says that for those who are interested, there will be a Community Training in his district held nfrancisco, chris smith, nbc bay area news. All right, christie, thank you very much. Joining us now, the man of the hour, jeff ranieri with some good news for those of you who have about had it with the heat. I know you like the heat. I do. But whatever you say, its fine. Whatever youve got is good for me. Okay, i like it. Much cooler weather moving in as we head through the next couple days. If you dont have ac, you are definitely excited about this. Well take you out to our live Sky Camera Network in tiburon, looking towards San Francisco. And no sign of any fog just yet. We still have a lot of hot, dry air over the bay area, and thats preventing any kind of fog from rolling in at the current moment. Lets take you out to the north where it was the hottest in santa rosa. 105 degrees today. Again, the hottest across the bay area was here. Set a brandnew record. Were beginning to drop, albeit slowly, but some changes down to 94, and focusing on 11 00, were going down to some cooler 60ss that ocean breeze does start to move in. So were beginning to notice some changes with that ocean breeze filtering in all the way through tomorrow morning. You can see as we start off not nearly as hot. 60s from San Francisco down to palo alto. So thats better for you. We still have 70s here, ce wth morning, we have 70s to 80s returning, butuld thats going to well, of course, bring you some relief tomorrow. You can see across the inland valleys, 88 here in concord. 88 in morgan hill. San francisco 76 and Half Moon Bay 69. Numbers drop tomorrow, but the big thing i want you to be aware of, by friday major changes rolling in. Look at this fog. Pretty thick for friday morning, even the possibility of some drizzle. Well talk about how much cooler it gets for friday and our rain chances. Thats coming up in about 25 minutes. Well see you in a bit. Thank you. Up next, forced to bail on the chase. The reason a bay areas tesla couldnt keep up. The juul recor. They took 12. 8 billion from big tobacco. Juul marketed mango, mint, and menthol flavors, addicting kids to nicotine. Five million kids now using ecigarettes. The fda said juul ignored the law with Misleading Health claims. Now juul is pushing prop c, to overturn San Franciscos ecigarette protections. Say no to juul, no to big tobacco, no to prop c. At at t we believe in access. The opportunity for everyone to explore a digital world. Connecting with the th