Thick mud traps tens of thousands at the Burning Man festival in Black Rock Desert, Nevada, while flash floods swamp streets in Las Vegas. WATCH FULL EPISODES OF WORLD NEWS TONIGHT: abc.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: bit.ly/3iQLwPp #Monsoon #Rain #BurningManFestival #FlashFloods #WorldNewsTonight