That father and son, they came in from livermore to cool off. And thats when they got in the water and realized they are being pulled out. Help arrived quickly and they say they were very thankful to the team from the Golden Gate National rec area who got in the water. They saw what was happening and responded quickly. A spokesperson says they are ocean rescue specialists who try to make contact with people before they get into trouble. Yesterday nearly a dozen people needed rescuing. That father and son from the east bay came to cool off with thousands of others over this hot weekend but realized they were suddenly being pulled out. We went out to go boogie boarding and i started catching the waves and then my dad, we looked out and we were like, oh, geez, were so far away. And then we were worrying. And we were trying to get out. Right away, he grabbed my son from me. Got him in a floating device. And then when the next wave came in, he gave me a good push and i rode the wave in so i could stand up and walk to shore. That spokesperson says because of the dangerous conditions and rip currents, certainly swimming not recommended here. Another option, though, stinson beach, a little farther north which has lifeguards. This weekend were told there were about two dozen rescues between saturday and sunday. Early this morning, San Francisco fire did their own drill and our Investigative Unit has been digging into the Safety Record here at ocean beach. After we started asking questions, federal officials are now taking a closer look at warning signs to determine if the language is actually strong enough. Reporting live in San Francisco, christie smith, nbc bay area news. You can watch our complete investigation on the dangers of ocean beach at nbcbayuary. Com. Click on the investigations tab and find a link to all of our investigative stories. Trying to stay cool in the east bay. One day after about ten people had to be treat forward heatrelated issues, plenty returned to the scottish games in pleasanton. There were misting stations there helping people cool off. Paramedics were on hand to help anybody affected by the heat. Anything over 100 is dangerous for any length of time. So seek those cooling centers, shade. The sun is very fatiguing, and you have to replenish your vital nutrients a lot more because youre sweating it out so much. Attendance has been hurt badly by the heat. Its down about 75 . Power outages remain a problem during this heat wave. Pg e says more than 2500 customers are still without power. Most of those outages in the east bay. The good news is the drop off from yesterday when almost 12,000 customers were without power. Important to remember your pets in this heat. Here some are attractive reminders. Our bay area viewers sent us great photos of their dogs keeping cool. Jean sent us this with her pup with a cool towel on its head. And this dog determined to stay cool even if the tub was a little small. We want to see your photos and videos. Send them to isee nbcbayarea. Com. The hot weather starting to taper off. But its still going to be hot for the labor day holiday. Track the forecast online at nbcbayarea. Com. Were posting updates on twitter and facebook as well. More tension tonight over north korea. Reports indicate the rogue country conducted its most powerful nuclear test ever. It caused a 6. 3 magnitude quake. The Trump Administration is now responding. Nbc bay areas thom jensen live in our san jose newsroom with more. Reporter the president once again also chastized china for not putting more pressure on north korea to end its nuclear test and left open the possibility for a military response against north korea. China is the countrys largest trading partner by far and could force kim jongun to choose between an economy that would nosedive or the countrys nuclear program. When questioned whether he would attack north korea, President Trump just said well see and later said the country is a great threat and an embarrassment to china. North korea immediately claimed a major step forward in its nuclear program, although experts have not confirmed it was a Hydrogen Bomb but it was definitely powerful. We dont know fo characteris of this weapon were, what the warhead looked like inside but they have significantly boosted the yield of their nuclear explosives. Reporter the white house says previous u. N. Sanctions did not slow north Koreas Nuclear buildup and the u. S. Treasury secretary has drafted a measure that would force countries to choose between doing business with north korea or with the u. S. More sanctions could also come off an Emergency SecurityCouncil Meeting in the morning. Tonight nancy pelosi of San Francisco responded saying, quote, north koreas latest nuclear test represents a clear escalation that requires a strategic regional and global response. Terry . Thom, thanks a lot. Much more on the developments in north korea coming up on nightly news. Experts weigh in on how the United States and the world will respond to north koreas claims. Nightly news begins after this newscast at 5 30. A terrifying moment for some b. A. R. T. Riders last night when a man pulled a knife on a passenger. It happened on a pittsburg bay point bound train. Several people called police when a man held a knife to another rider and threatened him. The train arrived at the west oakland station. Police were there but the suspect ran from them. They caught up with him and identified him as 23yearold jay eddie davis of burlingame. He was already on probation. Apples ceo tim cook is speaking out about the end of deferred action for childhood arrivals or daca. Cook tweeted 250 of my apple coworkers are d. R. E. A. M. Ers. I stand with them. They deserve our respect as equals and a solution rooted in american values. President trump expected to announce his final decision on daca on tuesday. He has threatened to end the obamaera policy that allows young people who came here illegally as children to remain in the United States and work. There are nearly 800,000 d. R. E. A. M. Ers in the program right now. Up next tragedy at burning man. The troubling scene at the festivals main event. Plus, pushing forward in the relief effort. What the mayor of houston says is the main focus for the victims of Hurricane Harvey now more than one week since the storm hit. My name is jamir dixon and im a locate and Mark Fieldman for pg e. Most people in the community recognize the blue trucks as pg e. My truck is something new. Its an 811 truck. When you call 811, i come out to your house and i mark out our gas lines and our electric lines to make sure that you dont hit them when youre digging. 811 is a free service. Im passionate about it because every time i go on the street i think about my own kids. Theyre the reason that i want to protect our community and our environment, and if me driving a that truck means that somebody gets to go home safer, then ill drive it every day of the week. Together, were building a better california. Vo last night the man broke the man who ran into the flames at the burning manifest val has died. The man broke through two layers of security guards to run into the flames at the ceremonial burning of the man event. Firefighters rescued him and he was airlifted to the uc davis burn center. He was not under the influence of alcohol. They dont know why he ran into the fire. Now to our continuing coverage of the aftermath of Hurricane Harvey. The long and difficult process of surveying the damage continues. Thousands of people across southeastern texas are now cleaning up. Streets are lined with the remnants of familys lives before the storm. The focus is hauling away this debris and finding housing for so many displaced during the storm. Have to take one day at a time. Save what you can save and the rest you can get back later. President trump declared today a national day of prayer in the wake of Hurricane Harvey. Students are also set to return to school on september 11th. Coming up remembering a legend on the guitar. Fans of the popular 70s band paying tribute to an icon who passed away today. Were watching our temperatures come down, but those humidity levels coming up as clouds from a former Tropical Storm bringing big thunder across Southern California and get closer to the bay area. What it means for your bay area forecast. At at t, we believe in access. The opportunity for everyone to explore a digital world. Connecting with the things that matter most. And because nothing keeps us more connected than the internet, weve created access from at t. California households with at least one resident who receives snap or ssi benefits may qualify for Home Internet at a discounted rate of 10 a month. No commitment, deposit, or installation fee. Visit att. Com accessnow to learn more. The most recognizable guitar riffs from the 1970 s died this weekend. Take nats the man responsible for some of the most recognizable giftar rifts from the 1970s died this weekend. St. Memories there. Walter becker, cofounder of steely dan passed away today at the age of 67. He played lead guitar. The bands hits included reeling in the years, doing it again and ricky dont lose that number. He was inducted into the hall of fame in 2001. The cause of death has not been made public. Rob mayeda joining us right now. Were going from fairly dry temperatures, triple digits, into Something Else thats going to feel like were in a different state. Felt like phoenix lately. Were going to move to florida. Were not making any friends in the Weather Department the last three days. But temperatures did come down considerably along the coast in San Francisco and eventually later this week cooling for everyone. Right now in the valley, still hot in thevalley. Up to 105. But San Francisco, 80. Thats still ten degrees above average but thats a lot better than 100 degrees. That was the case the last couple of days. As you can see, the forecast heading through tomorrow continuing on that slightly downward trend. Downtown San Francisco now into the 70s. Still above average but a lot better than a couple days ago. Not much improvement in the trivalley. 103 in pleasanton. Tomorrow the combination of the cloud cover and onshore breeze should bring temperatures down into the 80s and low 90s. Low to mid90s, that should start to a bit better in those inland east bay valleys. 93 right now. Tomorrow, temperatures climbing through the 80s. Some mid80s by the afternoon. That, too, well away from 100 degrees. Things improving in our valleys. Quality, however, not quite yet. Another spare the air day tomorrow as the sea breeze picks up tuesday and probably through the rest of the week, better air quality. East bay and south bay, unhealthy air quality and also smoke pollution. Morning temperature, 60s and 70s. Increasing clouds will have come in overnight. Well keep our temperatures up like we have this morning. And for tomorrow, the cooling starting to reach some of the valleys. 80s to low 90s around the santa clara valley. A chance of mid90s closer to livermore. Thats down from 105 today. Low 90s around concord and antioch. Lower 80s oakland, peninsula temperatures comfortable. But increasing clouds for the day. Humidity will be going up as you can see. 65 humidity there west of San Francisco. Winds southwest at 12. 70s around the peninsula up toward the embarcadero. Numbers in the north bay tomorrow mostly in the 80s. The interesting part of the forecast is all this dynamic weather to the south. Thats where the most intense thunderstorms will stay. Central coast southward. But increasing clouds later on tonight. If you have a few brief burst rain showers, could be from some of those weakening thunderstorms to our south. 3 00 a. M. , some of the models bringing a wave of showers across the santa cruz mountains. Tomorrow morning, mostly clear to start. Warmest temperatures of the day could be at 11 00 to noon because midafternoon and evening we look at mostly cloudy skies and that slight chance of showers. So the unusual tropicallike weather, the former Tropical Storm which went across baja, california, that was lydia. All the moisture being pulled up toward northern california. By tuesday and wednesday that storm system begins to lift out as a trough of low pressure, maybe an early sign of fall. Not to bring us rain. That would be nice if it did but it will bring us a very healthy push of cooler Pacific Ocean air. Thats going to drop our temperatures through the sevenday forecast. That mixing of the atmosphere may actually break up some of the low clouds. Toward the end of the week, temperatures in the 60s. Slight warming through the weekend. Heres the big change. Inland spots between today and yesterday compared to where well be by wednesday and thursday. Thats almost 20 to 30 degrees of cooling back to average second half of the week and much more pleasant weekend ahead next weekend. Those 80s great for the east bay valley. A lot of people saying, ah. Thank goodness. Coming up a mother speaks up for the first time about the mysterious death of her daughter. She was my world. She was we investigate the cold case of eden lynch and the new action by local prosecutors following our questions. Subject of a renewed investigation following questions from our investigative the death of a little girl nearly six years ago is the subject of a renewed investigation. Eden lynch was in the care of just two people in the final days of her life. Her father and his girlfriend. Investigative reporter vicki ngyuen digs deeper into what happened to eden. Reporter eden lynchs family said she was the light of their lives. A funny, kind girl who loved to play pretend. For years theyve wanted answers from the last two people who were alone with eden. Now the story two of families, two sides and two suspects. In spring of 2011, u. S. Coast Guard Service member jimmy barlow and his girlfriend holly were blending families. Moving into this alameda home with their daughters from previous relationships. Jimmy had just gotten custody of eden lynch, a month before her 3rd birthday. I called all the time. Reporter in Southern California, edens mom erica lynch hit bottom. She lost custody because of a drug addiction and burglary that put her behind bars. One month before her release, a guard delivered news eden was in the hospital. Hes like, your daughter is sick. And i said, no, shes not. Shes dead. And he looked at me and asked me, why did you say that . I said because he did it. He did it, didnt he . Reporter erica says she immediately suspected jimmy, claiming he had abused her during their threeyear relationship. What made you fear so much frp the safety of your daughter . My past. I know what i endured. And i didnt want my child to endure that. Reporter erica was granted a special release to join her parents at Childrens Hospital oakland. She told social workers investigating edens injuries that jimmy, quote, used to beat the crap out of me, but she didnt report the abuse because she was afraid of him. Her claims were never documented, and in interviews with cps, jimmy denied any Domestic Violence with erica. You believe what holly and jimmy say happened to your granddaughter . No, no. No, i dont. Reporter according to medical records and cps reports, the couple said eden tumbled down 7 to 8 concrete steps in front of their home. Jimmy was at work and eden was home with holly. The cps report shows they told investigators they didnt take eden to the doctor because she seemed okay. They say eden collapsed nine days later. Holly called 911. By then it was too late. She didnt look like my baby. Reporter eden never woke up. The coroner ruled her death a homicide. Blunt force trauma to the head. The day that child went to the hospital is the day they should have been arrested. Reporter she had been in jimmy and hollys care for just four months. Social workers noted that jimmy and holly severeliy in glectsed and failed to obtain medical attention that could have saved her life. But the report said there was not enough evident to show they did anything to cause edens head injury. Weeks turned into months, then years with no arrest. Holly and jimmy moved to alaska where he served at the coast guard station in kodiak. They have two children and married. Nothing has been done. Reporter then a surprise. Last sum efive years after eden died, prosecutors with the coast guard filed four counts of child endangerment against jimmy barlow for failing to protect and care for eafter her injuries. And that makes me feel like somebody cared about eden besides us. Reporter his attorney told us neither jimmy more hol he did anything to eden and that jimmy loved his daughter. The lynches wonder, how did the coast guard come up with enough evidence to file charges but Alameda County prosecutors couldnt. For weeks we asked to speak to the district attorney. They said the case was under review. They both had a reasonable expectation to protect that child. Reporter dan scott is a retired los angelesty sheriffs detective with more than 30 years experience. He served on a Blue Ribbon Commission to investigate crimes against children. We asked him to review edens case. You look at the injury, and then you look at the explanation. And its pretty easy to see when they dont fit. Reporter the former detective said there was enough evidence to arrest both jimmy and holly for child endangerment. While jimmy faces charges filed by the u. S. Coast guard, holly returned to the bay area with her children facing no charges. As far as edens family could tell, no questions. So we decided to ask her ourselves her mothers home in vallejo. Excuse me, holly. Were with nbc bay area. Do you know what happened to eden . Did you have anything to do with edens death . But the day after holly declined to speak and after weeks of asking questions about the nearly 6yearold case, the Alameda County d. A. Filed a felony child abuse charge against holly with a special allegation for willful harm resulting in death. They say she was in sole care of eden and failed to seek medical help as edens condition got worse. Her favorite blanket. Reporter erica lynch is starting again. Ive been Substance Abuse free since december 25th, 2013. Reporter and with new hope for justice, the lynch family says they can begin to heal. The coast guard trial of jimmy barlow has been delayed from september 11 tot december 4th. Well be there as it unfolds. As for holly, the d. A. Filed charges but she still hasnt been arrested. Well continue to follow this story and bring you updates. Im vicky ngyuen. If you have a tip for our Investigative Unit, call 1888996tips or theunit nbcbayarea. Com. A recordsetting astronaut back on solid ground after spending more than 600 days in space. Well tell you what shes looking forward to the most. Vo Peggy Whitson spent more than 6 a recordstetting astronaut just returned back home to earth. Peggy whitson spent more than 600 consecutive days in space. Its the longest any american astronaut has spent in space without coming home. Thats not the only record she set. Peggy is the worlds oldest female astronaut. She is 57 and the most experienced space walker ever. She says shes most looking forward to seeing her husband and having pizza again. Maybe not in that order. Not sure. Weatherwise, some changes coming. Humidity on the increase. Big storms to our south bring in the clouds tonight. Cooling temperatures for labor day. All right, rob, thank you. Nbc nightly news is next. More news at 6 00. Hope you can join us then. On this sunday night, nuclear escalation. North korea conducts its sixth and most powerful nuclear test yet in direct defiance of the United States. Tonight, President Trump condemns the norths provocative move, and defense secretary mattis warns that any threat to the u. S. Will be met with a massive military response. New evacuations. Thousands of homes are under an Evacuation Order in west houston more than a week after harvey first made landfall. Many have started cleaning out their homes, but damaged schools are disrupting the new school year for a lot of families. State of emergency. Firefighters in los angeles battling the largest wildfire ever inside city limits as erratic winds and scorching temperatures complicate the emergency