Getting around, walking to your tent in the mud is impossible. And from the roads to the skies, how millions of americans are dealing with the Holiday Travel crush after whats expected to be another record breaking weekend. Plus, making their case. Several gop candidates are on the trail in New Hampshire today taking advantage of this extra time to get in front of voters. As Donald Trumps lead in the poll widens, will any of them be successful at peeling off the former president s supporters . Well, there is hope that today could finally be safe for 70,000 people to leave the Nevada Desert where they have been stranded for days after torrential rain turned the campground of the decades old burning man festival into a vat of mud. Festival Officials Say the water is drying out, so its a waiting game for the roads to become passable as attendees ration supplies. The pictures are unbelievable. Look at your screen. A portapotty caked in thick mud. Local authorities are investigating one death but the Sheriffs Office says it doesnt appear to be related to the weather. Some have already made it out, trejing 5 or 6 miles to the town or ride. That journey is a mix because the mud acts like quick sand, and in the Black Rock Desert, its alkaline, meaning too much exposure could cause chemical burns. Nbcs Maura Barrett joins us on this. Do the people stranded have the supplies they need . Reporter well, lindsay it has become such a hectic situation looking at how one might typically want to spend their Holiday Weekend. This is not what they planned. The area got two months worth of rain in just two days, if that helps paint a picture of how inundated with water they have been experiencing, but people who attend burning man, they call themselves burners say its an event of radical selfreliance. That has been exemplified over the past weekend. A few people that spoke to our team on the ground about how theyre manging everything. I honestly think this is the best burn ever. Seriously, this has given us the opportunity to rise to radical selfreliance and to support each other and the community, and im having the best time. We got into the middle of the desert with no one around and got stuck there for like 12 hours. We like slept there, and finally, we were about to hitchhike, we were going to try it One More Time and got ourselves out. All eight lanes have to merge into one. Its a really slow process. Its still a great event. I love it, and im definitely going back next year. Reporter so a lot of surprising optimism youre hearing there, and thats what team on the ground says theyre seeing repeatedly as people are starting to walk their way out, make that exit, as Officials Say that those roads will really start to dry up to a point that more and more people can try to leave this afternoon starting around 3 00 p. M. Eastern time. Maura, stay with us, we know the Black Rock Desert saw more rain last night, and we do have nbc meteorologist Michelle Grossman to break town whats in the forecast moving forward. Michelle, what can we expect . Great to see you. The good news is we continue to dry out and will continue to dry out as we got to the next five days. That may not sound like a lot. That was two days worth of rain in 24 hours, 36 hours, and the problem is its a desert. Any rain that falls becomes runoff. The soil can absorb it. Theres no vegetation, and thats why we saw all the muddy conditions, and continue to see the muddy conditions. As we go throughout time here, you notice the green off to the east. Thats because were seeing the rain move to the east, and well continue to do that. Locally heavy rain in the great basin, and northern plains. For the burn, mostly clear skies, looking really good. Temperatures in the low 60s. Thats probably the biggest problem. Hopefully people still peel for their generators. It rebounds quickly during the day. It was chilly last night with temperatures in the 40s. Well see that once again tonight. As we look throughout time, the next five to six days, lots of sunshine. A small chance for showers in the morning on tuesday. Otherwise lots of sunshine and warm conditions. Lindsay. Michelle, thank you so much. Once the people get the clear to leave, how will it work . There are just limited usable roads and Tens Of Thousands of people trying to get out. Lindsay, even in a normal year when theres prime conditions, you have to remember this is a rural community, about 100 miles away from reno. In some years because you have dozens of thousands of people trying to leave at the same time, it can take up to 12 hours, im told, even if a normal year. I think the keyword is going to be patience and officials have also recommended that people stagger over the next couple of days, if they have flexibility. So their plan is to make sure everyone is not trying to leave at once. It is important to note, this is a festival about ritual and art, the ceo pointed out in an interview with nbc news today and because of the bad weather the past few days, they havent been able to safely set off the name sake of the event, the burning man. As long as the weather looks clear enough tonight, it could be happening today. Should be incentive for people to stay behind and stagger the exodus throughout the next several days, which will hopefully alleviate the endless traffic theyre probably going to see. You can see people struggling to get their feet up out of the mud as theyre walking. Thank you so much for that update. Labor day travelers are hitting the road as summer comes to a close. The major surge were seeing nationally and globally. Were back in 60 seconds. Astepro allergy, steroid free allergy relief that starts working in 30 minutes, while other Allergy Sprays take hours. With astepros unbeatably fast allergy relief you can astepro and go tourists tourists that turn into scientists. Tourists photographing thousands of miles of remote coral reefs. That can be analyzed by ai in real time. So researchers can identify which areas are at risk. And help life underwater flourish. I was told my Small Business wouldnt qualify for an erc tax refund. You should get a Second Opinion from Innovation Refunds at no upfront cost. Sometimes you need a Second Opinion. All these walls gotta go ah ah ah id love a Second Opinion. Take the first step to see if your Small Business qualifies. As the scorching summer winds down this labor day, Holiday Travel is heating up. Here in the u. S. , the faa expects 45,000 flights both today and tomorrow. And while theres a surge in post pandemic domestic travel, International Travel has picked up too. According to aaa both International Hotel bookings and crews for the holiday are up significantly compared to last year. Joining me now, nbc news Correspondent Kathy Park in tennessee. Matt bradley in london, and nbc news meteorologist Michelle Grossman back with us. Kathy, what have we seen from travelers, hoping to take advantage of the last weeks of summer . Reporter good afternoon to you, we have been plants here along Interstate 40 in east tennessee. We are right next door to the great smokey mountains, which is the number one visited National Park in the country. Also dollywood just a few minutes away as well. So you have a lot of visitors trying to get out. They all have the same idea, so you can probably see behind me. Basically the gridlock here, and right here in the foreground, this is a traffic actually trying to get out of the largest gas station in the world. You might have heard of it, buckys. So we are told from some of the drivers here, its taking roughly an hour just to get out of the gas station, and then once they get out, theyre dealing with the inner State Traffic as well. So this is a scene thats really playing out all across the country. Roughly 100 million americans are getting behind the wheel. They drove to their holiday destinations, and many of them, millions are headed home today or even tomorrow, and earlier this morning, we had a chance to speak with several people, visiting from all across the country, and heres how they plan on tackling the day. Take a listen. We got kind of delayed coming here. There was a couple of bad wrecks, saw a car on fire, so it was a rough trip coming in. Are you mentally preparing yourself for whats to come the next couple of hours on the road . I know it might be a little hectic, traffic jams with everybody traveling today. Were prepared. We got the music ready, filling up with food. Well be good. Reporter and lindsay, if youre trying to avoid all of this, the best time to leave was actually early this morning, so if you are planning out now, pack your patience, youll be sitting in quite a lot of traffic. The best time, if you have some wiggle room is around 7 00 or later on this evening. So keep that in mind. Also, aaa suggests, check your car if youre driving. Youre going to be spending a lot of hours behind the wheel. Make sure the Tire Pressure is in check, the battery is okay. This weekend, Holiday Weekend alone, theyre estimating rescuing 300,000 stranded motorists. Oh, wow. You got your music, your podcast, your snacks, and youre in it for the long haul. What can you tell us about people catching the Travel Bug Overseas . Reporter where you and katie and the rest of you are, its 4 bookings. The rest of the world, 44 increase. That goes to show americans are out in force. London is one of the most popular destinations according to aaa, alongside rome, paris, dublin and vancouver. Were seeing lot of americans come to buckingham palace. This is one of the most popular destinations for americans visiting london. I spoke with one of them about why she was here, and heres what she told me. Its cheaper than traveling within the united states. Reporter no. How so . I mean, eating out is cheaper, and you can visit more countries within, you know, One Travel Versus in the states. It just takes longer to get to one thing. Reporter yeah, so, lindsay, shes right. Its easy to travel in london, closer to europe, when she says it was cheaper, i dont know, i have been living here for seven years, and my bank balance wouldnt agree. If she lived here a little longer and tried to go out, tried to actually live here, shed see its a very very expensive city. I love it see Americans Travel Ing abroad and come to london. Maybe she lives in new york city, and shes used to the 20 or 30 entree. Who knows. Michelle, is the weather cooperate something. Its looking really good. Not looking at huge major storms. Were relatively quiet. That doesnt mean were completely quiet because we are watching the chance for some storms, thunderstorms falling right now. One of the places into the inner Mountain West, great basin, Central Plains as well, down to the south, looking along the gulf coast and Lower Mississippi valley, the chance for storms. You can see some lightning as i show you radar in just a bit. Dealing with record hit. Thats a big story in labor day. Its not officially over. Still, you want to turn that page to fall or at least the fall feel, and its really warm outside. Were looking at temperatures in the 90s, 100s, so many spots from the great lakes, and take a look at airport delays, looking very good. Very rare on holiday, every major hub. It updates automatically, in the green, good news, new york city, miami, seattle looking good. We did have a delay at San Francisco about an hour ago. Looking better now. Then the roadways, seeing some showers and thunderstorms as i mentioned along i10, and inner Mountain West dealing with heavy rain. Thats going to be a threat as we head throughout this afternoon into the evening hours. Where you see the yellow on this map, thats the biggest chance for strong to severe storms. Winds up to 60 miles per hour. That could bring down trees, power lines causing some damage. Some power outages, and also some hail. Its going to be an inch or larger, a low threat for tornadoes, but its not zero, and heavy rainfall. We have the threat for excessive rainfall that could lead to street and urban flooding. That will head to the east tomorrow, minneapolis, portions of the west, portions of Severe Weather tomorrow. And talking about heat alerts, we are looking at 12 million under heat alerts in september, labor day, thats in the midwest, the great lakes also the northeast, where you see the orange, that is a heat alert. The heat extends past those alerts, temperatures into the 90s. Climbing into the 100s, its going to feel like over 100 once you factor in the humidity. Some of these numbers, 101 in dodge city, 97 in indianapolis. 92 in green bay, really warm in the northeast. 92 in williamsport, pennsylvania. When you factor in the humidity its going to feel warmer than that. I know so many of us getting back to reality, to school, to work, were looking at temperatures soaring into the 90s, close to 100 degrees for so many people. 96 in philadelphia. The record is 95, 90s in madison, grand rapids, richmond, you get the idea. Its going to be another hot one tomorrow. Its going to be hot as we go throughout wednesday and thursday. Things begin to improve just a bit. As we head for the rest of the week, were looking at drying out conditions in portions of the inner Mountain West. The storm system is the same one that brought the rain yesterday, and burning man brought two months worth of rain in about 36 hours. Were looking at well above average temperatures, the no northeast to mid atlantic. Lots of rain in the midwest, great lakes down to the tennessee valley. You can see the green on the map. Thats the cold front moving through bringing all the rain. We could see strong to severe storms as well on wednesday. As we round up the week, showers in the mid atlantic. That storm system is going to make it across the country. Its not a huge storm but could bring problems to end out the workweek from new england to the northeast, mid atlantic, also to the southeast. September steam does not go away in the South Central states. We have been warm so long. Month after month, the whole summer long, breaking records, were going to continue to do that. Sunny and seasonal, were looking at the tropic, a system in the atlantic that could become our next named storm in the next couple of days. Well keep you posted on that too appreciate that. Kathy park, matt bradley, and Michelle Grossman, thanks to all you. This labor day is a critical test for republican president ial contenders, several candidates prepared to take the stage in New Hampshire just moments from now. Were live at this event next. Trying vapes to quit smoking might feel like progress, but with 3x more nicotine than a pack of cigarettes vapes Increase Cravings trapping you in an endless craving loop. Nicorette reduces cravings until theyre gone for good. ella fashion moves fast. Setting trends is our business. We need to scale with customer demand. 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