Near st. Helena. Terry mcsweeney, you were with crews a authority tishort its believed that lightning started this fire. Reporter a lot of evidence that lightning started it. I was talking to firefighters here. They say the focus tonight is on structure protection, saving the homes which are up state route 128, closed off as you can see. Everywhere you look, theres fire on the mountain. Huge flames leaping into the night sky along hennessey ridge. Cal fire says this fire has burned 2,400 acres and is 0 contained. With the hot, dry conditions that weve been having and then coupled with this weather that weve had, its not common for the area with all the lightning strikes that weve been having. Its just its very can be very hazardous for the fire conditions. Reporter the cause believed to be lightning. This video from the local chp office showing a strike a short while before the first reports of fire. This structure fell victim to the flames today. More than 200 other buildings are threatened, including the ones on the grounds. Nichelini winery. It looped around a canyon, and now its just where that smoke is up there. So its kind of at our perimeter. Reporter theyve been making wine here since their grandfather founded the operation in 1890. Its important for us to protect the house that he built, the winery he built. You cant really replace that. Reporter this cell phone video from the nichelini family doing lastminute preparations today, including putting sprinklers on the roofs of their buildings. One thing firefighters have going for them tonight is the wind. There isnt any as opposed to a few hours ago when the wind was pushing those flames right down that mountain. The nichelinis can now only wait for a phone call to fd ether th saved because like hundreds of others near this fire, theyve been evacuated. You mentioned the gamble fire burning north of lake berryessa. The latest on that, 600 acres burned and, like the hennessy fire here, zero containment. Live in napa, terry mcsweeney, nbc bay area news. Thanks, terry. We have video of that fire, the gamble fire. Lightning also blamed for this fire burning out of control near lake berryessa. This video just into our newsroom. The gamble fire, as we mentioned, also in napa county. We just checked with cal fire. As terry mentioned, 600 acres and 0 contained. Now, because of the dangerous and wild weather weve been seeing, we remain under a microclimate weather alert. Meteorologist rob mayeda is here. Rob, what are we looking at for the next couple of days . Well, right now at least the good news, terry did mention it. Were not seeing as much wind as we had earlier today and the lightning that sparked many of these fires has for the most part moved out. Temperatures still pretty warm. 79 degrees. The wind is relatively light at both the hennessy fire and the gamble fire, which has burned right down to the edge of lake berryessa. Lets give you the time lapse looking back on the hennessy fire. Notice that smoke plume being pushed all over the place by strong outflow winds moving away from thunderstorms. Thats the reason the fire took off today. You can see the north push of that fire with strong, gusty winds, then back towards the camera as the winds begin to change direction during the day. As the winds have backed off a little tonight and the thunder and lightning have moved out, that is good news short term for firefighters as we shouldnt see any more lightningsparked fires tomorrow. But the challenging conditions will be the terrain and temperatures likely above 100 degrees along the fire lines tomorrow. The rest of the bay area under that excessive heat warning through wednesday, when we can finally expect some cooling in the forecast, well look at that coming up in about ten minutes. Not just napa county, firefighters in sunol are battling the marsh creek complex fire. Flames there have burned about 1,700 acres. This is in the area of calaveras road and welch creek road. Ten homes under mandatory evacuation orders. And in contra costa county, a pair of fires being called the deer zone fires have burned some 1,400 acres there. These fires also zero percent contained. This is near deer valley road and marsh creek road just southwest of the city of brentwood. Evacuations are in effect for nearby areas, and lightning also the possible cause. Our continuing coverage on the first rolling power blackouts across california in nearly 20 years. For the second straight night, theyve been called off at the last minute, but the threat still looms through wednesday, and it coincides with that heat wave that weve been talking about. The need to conserve power so that the power grid isnt overwhelmed. Nbc bay areas ian cull has details of how pg e chooses which zones to turn off. Reporter tonight there were a number of Power Outages across the bay area according to the pg e map, but none related to rolling blackouts. California iso made a late decision, tweeting no Power Outages expected tonight, saying lower temperatures and people conserving at home helped keep the power on. It follows outages on friday and saturday. Encouraging all customers to prepare for the possibility of rolling blackouts. Reporter cal iso oversees the states power grid. In emergency situations like this, it tells utilities like pg e how much power needs to be reduced. Pg e says its given little notice, making it difficult to warn customers ahead of time. As for what neighborhoods are impacted, its a simple numbers game spread out over pg es territory. Once you know the megawatts, you can look at the different blocks and recognize, okay, these are the different blocks we are going to need to take out in order to meet the expectation or the directive of the cal iso. Reporter today Governor Newsom issued an emergency proclamation in an attempt to reduce the need for blackouts. Large energy users are now shifting to their backup sources during peak hours, and newsom says its unacceptable that the state failed to predict and plan for this crisis. Well get to the bottom of it, and we will lay out in detailed terms what were going to do to make sure this simply doesnt happen again. Reporter as for the people who have already had their power shut off, pg e says the same neighborhoods wont be affected over and over again. So if you lost power during one of these rolling blackouts, your home is essentially at the back of the line for the next one. Ian cull, nbc bay area news. We understand. Weve seen a lot of wild weather in the last 48 hours. Lots of you are sharing pictures and videos of this, these lightning strikes. Weve put together a gallery of those images on our website, nbcbayarea. Com. Night one of the Democratic National convention is in the books, and its a Convention Like no other with covid19 forcing the campaigns biggest celebration online. We, the people the Democratic National convention kicking off tonight with a theme of party unity. Even though delegates and speakers are scattered across the country. What better way to gather than all across america . Without the cheering crowds, democrats hope their message will stand on its own, saying theres a sharp contrast between running mates joe biden and senator Kamala Harris and the current administration. Michelle obama, the immensely popular and influential former first lady making the case that her husbands Vice President is ready to lead. I know joe. He is a profoundly decent man guided by faith. He knows what it takes to rescue an economy, beat back a pandemic, and lead our country. Onetime rival Bernie Sanders trying to win over his own supporters for biden, arguing President Trump is dangerous. And in an unconventional move, several republicans speaking out against the trump presidency. Its a path thats led to division, dysfunction, irresponsibility, and growing vitriol between our citizens. Governors Gretchen Whitmer of michigan, and andrew cuomo of new york zeroing in on fighting the coronavirus pandemic. Leadership matters, and it determines whether we thrive and grow or whether we live or die. Biden himself making a popup appearance in a conversation on racial injustice. I may be kidding myself, but i think the people are ready. I think people are ready. We just got to keep pushing. We cant let up. Biden and harris setting the tone on night one of the convention, seeking to pull their Party Together for the fight ahead. A San Francisco woman also made an appearance at the dnc tonight. Kristin urquiza lost her father, mark anthony, to covid19. My dad was a healthy 65yearold. His only preexisting condition was trusting donald trump, and for that he paid with his life. Urquiza says her father voted for trump in the last election. This november she will cast her vote for joe biden in her fathers honor. Well, tomorrow night in milwaukee were going to see another first. A virtual roll call as delegates across the country officially cast their votes to nominate joe biden. With the Democratic Convention beginning tonight, President Trump spent the day on the campaign trail through the midwest. Among the list of trumps stops, minnesota and wisconsin. During todays speeches, the president claimed that the only way hell lose the election is, quote, if the election is rigged. Just like they want to try and rig the election with all these mailin ballots. Lets send out 62 million ballots. Lets send well, you know, some people say, gee, you shouldnt talk i got to talk about it. The latest nbc news wall street journal poll shows biden leading trump nationally 50 to 41 . Still ahead, gunned down while helping a woman with her groceries. Tonight a powerful and emotional memorial for a young man killed outside of the safeway where he worked. Plus its been removed. The local county just taken off the governors watch list. And were still seeing inland temperatures into the 80s here after 11 00 as we see day four of five ahead on our excessive heat warning. When cooler temperatures will be making a comeback in our forecast when we come right back. We love our new home. Theres so much space. We have a guestroom now. But, we have aunts. Youre slouching again, ted. Expired, expired. Expired. Thanks, aunt bonnie. Its a lot of house. I hope you can keep it clean. At least geico makes bundling our home and Car Insurance easy. Which helps us save a lot of money oh, teddy. Did you get my friend request . Uh, ill have to check. doorbell ringing aunt jonis here for bundling made easy, go to geico. Com. Hello . We continue to follow that breaking news in napa county. Two fires raging tonight. Mandatory evacuations ordered. The hennessey fire near st. Helena has burned 2,400 acres and is 0 contained. And the gamble fire near lake berryessa, 600 acres, also 0 contained. Lightning believed to have sparked both fires. You can download our free nbc bay area app to get the latest updates on the firefights sent straight to your smartphone. A large memorial tonight for a young man shot and killed in the parking lot of a safeway in the north bay. Nbc bay areas jean elle has more on the emotional farewell. Amazing grace reporter an emotional vigil in a safeway parking lot in american canyon. Hundreds of people who knew 18yearold nathan garza held each other and cried. Next to a memorial of flowers and candles where he was shot and killed while working yesterday. Im never going to see him come around the corners anymore. Im never going to see him, and coming to work today was just reporter garzas safeway family, his Fairfield Community and his baseball family are all stunned. You guys lost a brother. Reporter baseball coach Armando Moreno says he watched garza become a talented athlete and a caring young man. After every practice, every game, no matter how good he did or how bad he did, he would walk up to each coach, extend his hand out, tell him thank you, coach, and the coaches were very appreciative. Not many kids do that. Reporter after the shooting, the Napa County Sheriffs Department found the suspected shooters car and arrested 23yearold Christopher Young of martinez. The motive for the shooting is not clear, but a chaplain who responded to the safeway after garza was shot says people are traumatized by his loss and the shooting that happened as he was helping a customer with her groceries. That he was trying to help bring out their groceries. One of them was a lady, which actually witnessed the whole shooting. Reporter violence that has a Community Mourning the loss of a young man who just graduated from high school and dreamed of playing professional baseball. Love you nathan reporter jean elle, nbc bay area news. Thinking of the garzas family. Its a scathing new report that slams mayor libby schaaf. At issue, the way the Police Department handled the shooting death of a homeless man. Joshua pollack was shot by officers 22 times. Officers said he had a gun nearby and posed a throat to them. But the report by a federal Police Monitor said opts investigation had gaps and former chief Anne Kirkpatrick didnt question it before signing off. The report also takes aim at mayor schaaf for calling the shooting awful but lawful. Former chief kirkpatrick released a statement that reads in part, quote, the report on the pollack shooting is purposely misleading and attempts to hide important issues that should be of public concern. She continues, quote, four entities came to the same conclusion that i did. The shooting was, while awful, was within policy. This years late report by mr. Warshaw must be read in context. We reached out to mayor schaaf but have not heard back. San Francisco Police are hoping that a big reward will help solve the murder of a 6yearold boy. 6yearold jace young was shot and killed july 4th on the citys bayview district. Today sfpd announced a 100,000 reward for information that leads to an arrest and conviction of the person or people responsible for that shooting. Jace was shot while watching fireworks. Police dont think he was the intended target. A man who led police on a chase in the south bay in custody tonight. It started with reports of a man with a pellet gun possibly shooting at other cars on highway 101 south of alum rock avenue in san jose. As officers kept other drivers away, the suspect took off in his car, leading police on a chase. They went after him for almost an hour, eventually tracking him down in front of a liquor store in south san jose. Police surrounded him with guns drawn until they felt they could safely have him get out of his car and on the ground. Turning now to the fight against covid19. The states Testing Backlog is officially cleared and we now know how its affecting our numbers. Late last month the state revealed some 250,000 tests hadnt been processed because of a glitch. Well, that meant the number of new cases was being underreported. Now the state is all caught up. After processing the backlog, it added more than 14,000 new cases. The numbers that we put out today are the latest numbers, 6,469 positive cases in the state. Those case numbers are high, but they are trending in the right direction. This graph breaks down what the governor is talking about. The blue line shows case numbers before the backlog. It was declining. But as you can see, the yellow line shows the trend with the backlog cases now added, and the numbers are just slightly a bit higher but numbers are still trending downward. It is a step in the right direction for a coastal county. Governor newsom says Santa Cruz County is off the state watch list. He said it actually happened on friday. The list, though, is constantly changing. Tonight the counties you see highlighted in yellow are on the list. 42 of them in total, including all nine bay area counties. Counties are put on the list when theyve had three Straight Days of concerning numbers. Theyre taken off the list after three days of positive trends. A lot of people flocking to the beaches, especially over the last couple of days because the weather is so hot inland. Give us an update,b. Yeah, it looks like were sort of in the middle of this heat wave right now, and another two more days of temperatures inland that will be very close to records again tomorrow. Right now, heres where some of the cool areas, San Francisco, 62 degrees. Did get up to 81 degrees a bit earlier. Speaking of 80s, still 80 degrees outside in the trivalley. 81 after a high of 103 degrees in dublin and walnut creek, another spot still in the 80s after a high very close to 100 degrees. 99 earlier. With fires burning across napa, the diablo range off to the east and fires to the south, smoke pollution will continue to be the issue. Another localized smoke alert or smoke advisory across the bay area with moderate levels of smoke pollution. Probably highest out around the east bay and south bay. Again, with fires to the north, east, and south now, its almost any given wind direction at this point is going to be pushing some smoke down into the bay area. So notice here the good news. Shouldnt see any more lightning sparked fires as this moisture now begins to lift away from the bay area. So as we head towards tomorrow morning, a morning without dozens of lightning strikes for a change. Still pretty warm outside. 60s to mid70s as we start the day. And actually looking at a few clouds passing by during the morning. Some high clouds lifting off towards the east. Also notice the lack of fog on the coast. The ocean airconditions as we like to say as the winds turn onshore without a lot of deep fog or low clouds in the coast, inland areas cant cool down. San jose southward, upper 90s to near 105 degrees around morgan hill. Trivalley, inland east bay, some of the hottest temperatures we should see. Numbers near 100 degrees to 106 farther inland. Out towards areas along highway 4. Peninsula temperatures in the upper 80s to low 90s. Down the peninsula, even downtown San Francisco again tomorrow should be climbing close to 82 degrees. And the north bay, this is going to be the biggest temperature because youre not going to be seeing thunderstorms. Highs climbing into the 90s to just ab