Plus, the sports stars making the relief effort a team effort. And blazing battle. Firefighters fighting the largest wildfire in los angeles history. Hundreds of people forced to evacuate their homes. Theres a lot of fuel here in the mountains. The battles from the air and on the ground to save people, pets, and property. We say good morning on this sunday morning. We want to get right to the breaking news overnight. A fresh provocation from north korea. It could be extremely concerning. The regime announcing it has carried out one of its most powerful Nuclear Tests yet. In fact, its most powerful test yet. Theyre calling it a quote perfect success. They claim it was an hbomb capable of being mounted on an intercontinental ballistic missile. They released this photo showing and inspecting the loading of the hbomb into a new longrange missile. North koreans seen cheering in the streets when the announcement was made. The specific claims have not been verified. The artificial earthquake caused by the test was several times stronger than tremors from earlier tests. Reportedly it shook buildings in china and russia. Its being reported that president Trumps National security adviser, h. R. Mcmaster, had an emergency phone call overnight with his south korean counterpart. And this morning President Trump is tweeting about north koreas latest move. We have Team Coverage this morning. We start with ian pannell in our london bureau. Good morning to you. Reporter this is a highly provocative and dangerous move. Just over two weeks back, the president praising north korea for seeming to back down. From its threat to launch missiles towards guam. Now its clear pyongyang is driven to develop a Nuclear Weapon that could put america within range. Overnight, the north Korean State News Agency announcing whats believed to be its most powerful nuclear test yet. A Hydrogen Bomb fitted for an intercontinental ballistic missile. Striking new images coming in of kim jongun inspecting the bomb that north korea says has unprecedented strength. The announcement coming hours after the usgs detected a 6. 3 magnitude explosion near the site where all of the Nuclear Tests have been conducted underground. South korea calling it an artificial earthquake. Japan saying it may have been caused by Nuclear Tests. Seoul believes it is four to five times stronger than the one dropped on nagasaki. In japan in 1945. Its definitely the largest one we have seen before. Reporter this latest provocation further highlighting the tensions over the rapid expansion of the north Korean Missile program. North korea best not make any more threats to the United States. Reporter just weeks ago, President Trump making a bold statement in reaction to kim jonguns threats to guam. They will be met with fire and fury, like the world has never seen. Reporter and just four days ago, the u. S. Joining forces with south korea for joint military exercises, flying bombers in a show of force after kim jongun launched his 21st missile since february. Even its close ally china is strongly condemning the test. As is russia. South korea wants america to deploy its strongest strategic assets to completely isolate pyongyang. The question now, how will, how can President Trump respond . Dan, paula . The world on high alert. As ian said, one huge x factor in all of this is President Trump. As ian reported, President Trump has threatened the north with fire and fury. As ian mentioned, south korea is calling on the u. S. To deploy its strongest strategic assets. That could mean reintroducing nuclear. Weapons. David kerley is at the white house this morning for us. Good morning to you. Reporter good morning, paula and dan. No word from the white house overnight but this morning a strong review from the president of north korea. And criticism of a u. S. Ally in a series of tweets at 7 30 this morning the president calling the north korea action a quote, Major Nuclear test adding quote, their words and actions continue to be very hostile and dangerous to the United States. He called the north a rogue nation which has become a great threat and embarrassment to china. And then he went after the u. S. Ally south korea saying it is finding quote, as i have told them that their talk of appeasement with north korea will not work. They only understands one thing. But the president doesnt say what that one thing is. We do know that h. R. Mcmaster the National Security adviser here at the white house did talk to his counterpart in south korea overnight. A 20minute phone call. The South Koreans had been warning they might test any day now. Mr. Trump has talked to the japanese leader yesterday. The south korean on friday some strong criticism from the white house this morning. Dan and paula. David kerley, thank you for the update. For more, we want to bring in retired marine corps colonel and abc news contributor steve ganyard. Thank you for joining us this morning. First and foremost, if the claims are true. Good morning, paula. That the north has a Hydrogen Bomb and can use it on the u. S. , how concerning is this to you . Its a big concern, paula. This is a step up in nuclear capability. In the past, they had only demonstrated what we call a fission bomb. What the u. S. Used in nagasaki and hiroshima. Moving up to a thermonuclear device is a big step. And as ian said, its much stronger. A big step up in capability. Very worrying when you put it together with the pictures of kim jongun showing a miniaturized thermonuclear device. The president has promised fire and fury. What options does he have here . Dan, other than a preemptive strike, which nobody wants to do because it could turn the whole peninsula into fire and cause millions of casualties. One of the problems here is not being able to do military. So what do you do . You turn to economic sanctions. As david said, we have had three discussions with the Prime Minister of japan. Maybe there are economic sanctions that the u. N. Will ramp up here. Right now, we have no options other than economic sanctions and begin to think about what is a containment strategy for this new nuclear threat. We have been reporting all morning that south korea is asking the u. S. To deploy its strongest strategic assets. Where do you see this going . Could this mean war . Or do we have to live with them proliferating weapons and possibly selling them . We heard what could be code for requesting the United States to reintroduce tactical Nuclear Weapons to the korean peninsula. U. S. Tactical Nuclear Weapons. These would be airdropped weapons. Its a back to the future kind of cold war capability that had been moved out of europe and south korea in the 90s. Its back to a much tenser time. But i think its going to be something where well have to learn to live with a nuclear north korea. Thank you, steve ganyard. For your analysis on a busy sunday morning. We appreciate it. We want to remind everybody to tune in for a special edition of this week later on. Martha raddatz reporting live from houston. Shell have the latest news on north korea and hurricane harvey. Thats later this morning on this week, right here on abc. Speaking of harvey, just as the gulf recovers, there is another big Storm Brewing right now out in the atlantic. Hurricane irma. And meteorologist cheryl scott from our chicago affiliate is in for rob with a look at where irma is and where it could be headed this morning. Good morning to you. Great to be here. The tropics are active. Yes, all eyes right now on hurricane irma. This has strengthened overnight. Its a category 3 hurricane. And its going to continue to churn. Give you a perspective. Everyone needs to pay attention. This could intensify more. Perhaps category 4 strength as we head later into the week. Come friday, winds up to 130 Miles Per Hour getting close to the caribbean. You can see the track. Getting closer to the southern tip of florida. Anyone from florida to the carolinas, even the midatlantic has to pay close attention to this storm. Well have more details on this the latest path, what to expect, all coming up in a bit. Back to you. One more thing to worry about. Not what you want to see. Not at all. Along the gulf coast, cities still submerged. People desperate for clean Drinking Water. And now, fresh questions about when kids there can return to school. The president and the first lady made their second visit to the region on saturday. Speaking with families at shelter. Serving lunch to evacuees. Victor oquendo is in houston this morning. Good morning to you. Reporter good morning dan and paula. The president made his way to lake charles, louisiana, where he met with First Responders. The first stop was to nrg stadium. He visited some of the nearly 43,000 people displaced by harvey. President trump and first lady melania back in texas. For the second time this week. Who wants a hot dog . Reporter focusing on those whose lives were upended by Tropical Storm harvey in houston. At nrg stadium connecting with families displaced by the flooding. Spending a little extra time with the youngest victims. Some getting a president ial hug and kiss. As tough as this was, its been a wonderful thing. I think for the country and the world to watch. Its been beautiful. Reporter the president took a more handson approach on his second stop. A church in houston now serving as a distribution center. Praising members of the army and coast guard. Addressing how long it will take to recover or rebuild. They say two years, three years. I think because this is texas, youll probably do it in six months. I have a feeling. Reporter cleanup and Recovery Efforts continue across the texas gulf coast. We have watched families clear out their waterlogged homes. Piles of debris lining the streets. Schools also drying out. The start of the school year delayed. The superintendent says an estimated 10,000 to 12,000 students will need to be temporarily moved to new schools. This is hilliard elementary school. One of more than 20 schools that the district is saying has suffered extensive damage. You have sandbags that line the doors here. This hallway is a mess. Clearly a lot of water came through there as well. Every piece of flooring has to be ripped out. Walls are going to have to be ripped out. Theres electrical damage. That kind of extensively damaged campus wont be open for months. Reporter the president also spoke about the letter the white house sent to Congress Formally asking for 8 billion in harvey response efforts saying he hopes it goes through quickly. Dan . Paula . Victor oquendo, reporting from houston. Thank you. Lets move from houston to beaumont, texas, the situation is dire. The city of more than 100,000 people is entering its fourth day without the necessity of clean Drinking Water. Kenneth moton is in houston with the struggle to supply the city. Kenneth, good morning to you. Reporter good morning, paula and dan. People in beaumont are trying to decide whether they should leave home and find places closer to houston to have more resources and running water. This morning, emergency in beaumont, texas. 100,000 people without Drinking Water. The system flooded. Damaged by harvey and the swollen river. Seven feet above the record level. This is the toughest challenge im sure. You have done the rescues. Gotten through the hurricane. Now trying to sustain the life. Sustain the life. Get the water back on. Thats the number one priority. Reporter the river has crested but the raging floodwaters are slow to recede. It could be days and weeks or longer before the crews can inspect the pumps and make repairs. The city, state, and feds are getting Drinking Water in. The active military operations are ongoing. This is being used to drop off and pick up large pallets of Drinking Water. For shelters and different points so people can get the clean water. This distribution point served 6,000 vehicles in ten hours. We have seen a huge number of people just come together in this community. And all across the state of texas, to help each other out during this time of disaster. Reporter the line stretching for miles. Clean water, a hot commodity. Hot meals right now, rare. The owner of this Seafood Restaurant giving one plate of food per car for free. Youre popular today. I dont want to be popular. I just want to help. Reporter residents thankful for the help. This is a blessing for us to come down here. Thats a blessing right there. Reporter beaumont has temporarily brought in several pumps to move water to its treatment facility. Its doing very little. For now, the city keeps handing out bottles of water and praying for the river to go down faster. So many people offering a hand to help. Thank you so much. We want to turn to california. Los angeles is dealing with its largest wildfire ever. Hundreds of people forced to evacuate. Our Senior National correspondent jim avila is in burbank, where theyre surrounded by the flames. And worried that the wind could shift. Jim, good morning to you. Reporter good morning, dan and paula. This is is not a wilderness fire. These flames are burning hot and fast just 100 yards from l. A. Neighborhoods. Overnight, the largest blaze in los angeles history exploding across nearly 6,000 acres of land. Forcing the evacuation of at least 700 homes in burbank, glendale, and sunlandtujunga. Brush fueling the flames. I encourage all home owners in this area and anywhere in the brush area to clear your brush. Give us a chance to save your house. If its not cleared, the fire is going to burn the fuel all the way up to the house. Reporter this man, captured on camera, atop his roof, trying frantically to put the fire out himself. Wildlife fleeing. Residents rushing to get their own animals to safety. All the memorabilia i needed to get out is in the car. Reporter firefighters in helicopters dumping thousands of gallons of water. To try and slow down the blaze. The fire now 10 contained. Luckily no one has been hurt. Officials are working with reduced numbers. 100 l. A. Firefighters unavailable. Dispatched to texas to assist with hurricane harvey. This morning, the call is out for additional firefighters from around the state to lend a hand. The weather continues to be a problem. The winds pick up during the daytime and temperatures reaching triple digits. Dan and paula . Cant understate the dire situation there in l. A. Jim, thank you for your reporting. We want to go back to the weather, and meteorologist cheryl scott is in for rob this morning from chicago. Great to see you. Great to see you. The heat is a huge problem. No end in sight. Take a look. Excessive heat warnings. Up and down the state of california. You can see the red flag warnings. This is going to be dangerous for the wildfire situation. Record highs from yesterday. Redding, 114. San francisco, at 104 degrees. These are about 10 to 15 degrees above average for this time of the year. The record heat. The High Pressure ridge continues to pump in the heat. Redding, 113. In medford, 104. Into your labor day, the heat is going to continue to cook here. Do what you can to stay cool. Well keep you posted on this. The heat will continue monday, tuesday, for a good part of this week. That is a look across the nation. Now heres a look wh oppressive out there, but look at that. We have wind blowing in the city, and thats going to change the dynamics today of slightly cooler air. Still pretty hot inland today with the heat warning and the advisory around the bay. But numbers will be cooler. At the coast, well see more cloud cover and the advisories expire tonight. 83 for you in San Francisco. 90 in oakland. Over 100 degrees ine so, looking good, especially in chicago. Well have temperatures in the 80s and sunny conditions. 83, im guessing. 83. Thats what weve got. My husband took our middle child back to chicago where he was born to see a cubs game yesterday. They said it was absolutely beautiful. Perfect weather. Perfect weather. All weekend. The. The is Silver Lining for the rest of the stuff going on. You left. You left them the great weather in chicago. Exactly. But happy to be here. Im only thinking about it. Im focused on this irma thing. Really worried about it. Those maps do not look good. It could be dangerous. Pleasure to have you here on a sunday morning. A lot of other news. For that, we go to dr. Ron claiborne. Whats happening . Dr. Dan harris, good morning to you. Paula, adrienne, cheryl. Good morning to you. We begin with russia accusing the u. S. Of acting illegally in seizing three russian diplomatic posts in the u. S. This new video posted on social media from russian officials from inside one of the compounds. Two in washington, d. C. , one in San Francisco. This morning, the Russian Foreign ministry calling this a seizure, a hostile act. And a gross violation. Of international law. President trump ordered one compound and two annexes closed. In response to the kremlins move to expel hundreds of workers from the u. S. Embassy in moscow. And in philadelphia, police say a suspect has been taken into custody and is expected to be charged with murder in the disappearance and death of a Temple University coed. 22yearold Jenna Burleigh was last seen thursday in a bar where police say she met the suspect, 29yearold joshua hupperterz. Her body was found on