Officials say it is the key to stopping the surge, but not everyone is listening. Certainly awkward for me to approach a citizen thats my customer and tell them that they need to cover their face. Tonight a new effort to crack down on people not wearing masks. There are new numbers out tonight that illustrate why covering your face can put a big dent in the spread of covid19. State Health Leaders now say wearing a mask 80 of the time could reduce transmission by as much as 60 . This as late tonight another bay area county puts some teeth into its mask mandate. Nbc bay areas cheryl hurd explains. Reporter the emergency order making it mandatory to wear face coverings in Contra Costa County is in effect not everyone is happy in danville. I dont understand that. You know what i mean . Where youre forced to wear a mask. I just had a kidney tooken out. I got bad lungs, this and that. I cant wear a mask, but it is what it is. Reporter according to the state, wearing a mask is essential if you want to flatten the curve. He says 80 compliance could reduce transmission by up to 60 . Having that mask on or handy is a very important tool as we continue to see the evidence grow that it can help reduce the spread of covid19. Reporter recovery Candace Anderson says, wont happen until people are forced to follow the rules, and money could be that incentive. We continue to have increasing cases, increasing hospitalizations, and a lot of it is people just not complying with the health order right now. Reporter out of nine bay area counties, six of them require face coverings. San francisco just tightened its rules on saturday, issuing 123 warnings. We have yet to find a county that has issued a fine. In Contra Costa County, those fines start add 100 for the first offense. Get caught a third time, you can face a 500 fine each time. Norm walsh says as a business owner, the mas feel like im to police the public, and its not my job to police the general public. Reporter in danville, cheryl hurd, nbc bay area news. New at 11 00, covid19 cases are being reported at a south bay costco. Tonight Santa Clara CountyPublic Health is investigating cases at the warehouse store on Lawrence Station road in sunnyvale. Health leaders say the store didnt have to shut down because it followed county rules for handling these situations. Those include identifying close contacts who may have been exposed, disinfecting the store, and notifying the county about the exposure. Looking at the numbers across the bay area, more than 900 new cases were reported. Contra costa county saw the biggest jump, 231 new infections. Another of the hot spots in the region, Alameda County adding 195. Statewide, though, a positive sign tonight. Case numbers have dropped four days in a row. Dailey new cases in california shown in this graph showed the numbers peaked one week ago on july 21st. The state reported 12,000 new infections that day. But since then, cases have dropped every day. Look at today. 6,000 new cases, half of the number from last tuesday. Now, lets shift and take a look at the 14day average of new cases. You requecan see the line has td upward over the past two months, but the last few days its dropped. Our first sign in quite some time of cases trending downward. While this is encouraging news, its important that everyone continue to wear a mask and social distance if its to continue in this direction. It was easy to social distance at oracle park tonight, and no traffic leaving the stadium. A live look at oracle park right now. The lights are still on after tonights giants home opener. A home opener like no other for the giants. The fans in the stands were cardboard cutouts. The crowd noise piped in, and tailgating was practically nonexistent. But the baseball was real, and thats really what matters to the fans. Nbc bay areas Terry Mcsweeney joins us live from oracle park with more on this ultra weird opening night. Terry . Reporter ultra weird beginning to middle to end. It was absolutely the strangest night of my baseball life. But at least we had baseball. Miami marlins, they dont have baseball. Theyre not going to have it until at least next week because of a covid19 outbreak. So the fans are out here tonight are saying, lets celebrate this crazy beginning to this season while we still have it. Lets go marlins reporter some hints of normalcy at oracle park for the giants home opener tonight. Lucille doing his thing. The cove covered with kayakers and fans trying to peek in to see the game for free in right field. But inside, no fans, just cardboard cutouts because of covid19. Twin sisters Kristen Hembree and lisa thomas havent missed a home opener in ten years and they didnt miss tonights. Just to have something positive and normal even if its just weird. And even if its just two is fragile season might last. The Miami Marlins today announced four more covid19 infections for a total of 17. No more games for them this week. Manager gabe kapler says players still have to focus on baseball. I think theyre pretty focused on and excited about opening day, and i think that theres plenty to get to today with respect to our doing our jobs on the field. Reporter some fans like eric and daughter madison lee. Are you excited to be here . Yes. Why . Because. Reporter are rooting for the giants and for the already shortened season to go the distance. Im just glad this is some sense of normalcy, right . Its been too long, and we need sports to come back. Reporter lets finish it up with some good news. Major League Baseball says since friday, it has tested 6,400 players, and onfield personnel, and they havent found one other case. Nobody outside the Miami Marlins seems to have covid19 so far. Live at oracle, Terry Mcsweeney, nbc bay area news. Thanks so much, terry. Right now, the Berkeley City Council is debating a resolution to help cal students struggling to pay their rent. It would urge uc berkeley to comply with rules that restrict evictions. Berkeley landlords cannot evict people for failing to pay their rent during the pandemic, but uc berkeley is exempt from that ordinance because its a state agency. The resolution also requests students be allowed to terminate their lease without penalty. Weve just learned there will not be a vote on the matter, though, tonight. One year later, and they remain gilroy strong. Today marks one year since the mass shooting at the garlic festival. A gunman opened fire, killing three people and leaving 17 others hurt. Tonight the Community Came to honor the lives lost and those who survived and the First Responders who prevented further tragedy. Nbc bay areas ian cull has the story. Reporter one year later, it hurts. It always will. But especially today as those affected walked back to the site where it all happened. That day was ripped apart right here in this park. Reporter its why the Santa Clara County d. A. s office that has worked with victims memori to remember the gilroy garlicee killed last year. 25yearold trevorerby, key la salle azar was 13. And Stephen Romero was just 6 years old. Theyre our community, our people, our families, and our friends. Reporter this woman is kaylas aunt. It has changed our lives forever, and our family will not be the same without kayla. Reporter in the backdrop, the Memorial Garden with three rocks for each of them. Then a video presentation that shared what the victims loved. It brought it all back. Because of social distancing rules, the event was streamed online where they honored the three gilroy officers who heard shots that day and ran right into danger to take down the gunman and save countless lives. Each receiving the d. A. s medal of service. And for the rest of our lives, we will never forget those three officers. Reporter one year ago at this park, thousands were just trying to enjoy some food, some garlic, their families, and a south bay tradition. But tonight it hurts all over again, and the families hope someday soon, it will get easier. Today we woke up, and i mean its the same feeling weve been having since, you know, they won. A lot of anxiety, pain, and we want to thank everybody for coming here. Reporter in gilroy, ian cull, nbc bay area news. We have a series of stories and interviews remembering the victims and honoring the heroes on our website. Just go to nbcbayarea. Com and search gilroy strong. Tonight an investigation is under way into how a 10yearold boy riding his bike was hit by a delivery truck. It happened just before 1 00 this afternoon on merry wood drive in lafayette. Thats near Lafayette Community park. The boy driver of the truck is cooperating. A massive fire in San Francisco sent smoke across the bay into oakland. The fire sparked about 7 00 this morning near fulsome and 13th streets. Flames engulfed six commercial buildings. Most of them familyowned businesses. Its about time for Something Like this to happen, i can tell you that, if you do lose your business, especially for us too. Essential industry. Now no idea what the heck were going to do. Reporter it took more than 100 firefighters to knock down the flames. One firefighter was hurt, but we hear hes doing okay. No word on what sparked the fire but investigators are looking into a mattress fire in a homeless encampment that was put out behind the building hours before this fire started. Still ahead, a powerful new tribute to george floyd. The unusual place where it was unveiled and where its headed next. And San Francisco businesses remain closed while waiting for covid testing. The major backlog delaying any reopening in the city. Im chief meteorologist jeff ranieri. Ill show you exactly where that fog rolls in for tomorrow morning and whats ahead for the rest of the week coming up in about eight minutes. We made usaa insurance for veterans like liz and mike. An army family who is always at the ready. So when they got a little surprise. Two . They didnt panic. They got a bigger car for their soontobebigger family. After shopping around for insurance, they called usaa who helped find the right coverage for them and even some muchneeded savings. That was the easy part. Usaa insurance is made the way liz and mike need it easy. Now theres more to loveched the with xfinity x1,gs . Ed it the ultimate entertainment experience. Like live sports. H. And more streaming apps all in one place. More classics. More premiers. Plus, more to easily find using just your voice. Hello, more. Where have you been all my life . Find your favorites and more all in one place with x1. Plus, get speed, coverage and security with the xfi gateway. Xfinity. The future of awesome. Deescala new at 11 00, a hologram of george floyd lit up over the statue of confederate general robert e. Lee in richmond, virginia. Several members of the floyd family were there when it was unveiled. Its part of a project that aims to transform spaces formerly occupied by racist symbols into messages of hope and change. This is the first stop. Organizers say it will travel on the same route as the freedom riders who traveled through the segregated south in 1961. A grieving family is begging for help tonight as they try tow find the person who killed their loved one. Jeffrey chambers, known as lil jeff, was stabbed to death almost two weeks ago. It happened in the 800 block of peralta street in oakland. Today his family held a News Conference pleading for the Publics Health in finding the killer. Chambers father is devastated. My son went to Prescott School and died right across the street from the school. How could that happen . Its unbelievable. We are a close knit family around here. A 10,000 reward is being offered for information leading to an arrest. A tentative date has been set to start fixing the leaning Millennium Tower in San Francisco. According to the magazine yt engineering news record, construction should begin in midnovember. As weve previously reported, the plan is to prop up the leaning building with 52 piles pounded into the bedrock. The job should take two years to complete. The Homeowners Association says construction could begin even earlier in october if things move faster than expects. Changing the scope of the mayors powers in san jose is apparently not polling well. After a marathon zoom meeting that spanned two days and grew hostile at times, the city Council Voted to put the strong mayor issue on the November Ballot rather than deciding the matter themselves. It would expand the mayors powers, bringing them in line with those of other bigcity mayors, but the mercury news reports new polling data indicates the measure may be a tough sell to voters. So mayor sam liccardo proposes delaying it until the november election in 2022. As covid19 spreads, some bay area restaurants are shutting down temporarily when an employee tests positive. Many want to have every employee tested before returning, but as nbc bay areas jean elle reports, they are waiting longer than expected for test results. Covids been quite challenging. Reporter adam mesnick closed the doors at the deli board eight days ago after an employee tested positive for covid19. For the safety and health of not only our employees but the customers. Reporter he planned to reopen thursday. Temporary closure signs are popping up at San Francisco businesses. Andy town Coffee Roasters closed several locations. We decided to just out of an abundance of caution to close everything just so everyone could get tested. Reporter but employers say scheduling tests and getting the results is taking longer than expected. I have other employees who its going to be a week for them to get tested and then probably another week to get results. Reporter Lauren Crabbe is planning to open the doors august 2nd. Shes hoping to have results for all employees by then so everyone can feel safe. From a business perspective, its really important to have that Rapid Testing so that we can get back to work. Reporter acknowledging the backlog, state Health Leaders are issuing new guidelines for who should be tested. Were at a point right now where we can say everybody that wants a test needs to get a test . The answer is not today. We need to prioritize the testing for those who need it the most and for Public Health purposes. Reporter those with symptoms, essential workers, First Responders, and those possibly exposed to a person with covid19 should be the first to get a test. Jean elle, nbc bay area news. California will soon start tracking the Sexual Orientation of people getting tested for covid19. Providers already have to report about race and ethnicity, but the state hopes collecting this new data will close any gaps in testing and treatment. We expect over the course of the next month that well see improvements in the use of these fields and our ability to report out to you and to use this data to effectively see how our interventions are working. Labs will also be required to collect and report the information to the state. 93 of californians are currently living in a county on the governors watch list. That includes every bay area county except san mateo. However, the peninsula could soon join the list as the Health Department says it has more new cases than allowed under state guidelines. Meanwhile, Santa Cruz County was recently put on the list. Today it was forced to close several indoor operations. That means like most of the bay area, hair and nail salons can only operate outdoors, but indoor malls, places of worship, and gyms must shut down. Time to get a check on the forecast with chief meteorologist jeff ranieri. Weve had some really pleasant days this week. Is that looking to continue for the rest of the week . It does look like well continue to see that really beautiful weather here for the bay area as we head right into this upcoming weekend. Its all courtesy of that fog at the immediate coastline. So lets go ahead and get you ready for that wednesday forecast. With so much stuff happening each and every day, everything kind of changing for a lot of us, the weather definitely has been kind of the mainstay here. You can see as we move through tomorrow morning, we get another round of those low clouds back right here across the north bay, also over the east bay and some of the low cloud cover as well for the south bay, including san jose. Then as we progress through the afternoon, we get our sunshine back by 1 00, and thats whats going to make it the best day. We get that cool start, and then we get that sunny afternoon. Temperatures for the morning begin at 56 in the trivalley. I have you at 57 in the south bay. Also dropping down to the mid50s in the east bay. Early fog in San Francisco. 54. And the te a look at my forecast as we roll through the day tomorrow. Numbers are pretty stable. Were not going to see a big change tomorrow. In fact, if anything, numbers will go a degree or two cooler because of the way the fog is moving in at the coastline. I see us at 82 in cupertino. 83 in downtown san jose. Right here for the east bay, its a split picture. Low 90s for concord and livermore and places to the east. Closer to the bay were down to 72 in oakland. Lets bring you to the peninsula. Its been perfect here in palo alto. Another day with 78 degrees. San francisco, its chilly. You had 50s to 60s here from the marina to the mission. And for the north bay, napa, sonoma, santa rosa all c