risk of failing. we are dealing with a catastrophic loss. norah: plus dangerous heat inspecting tens of millions of americans from coast to coast. the news starts now. there is a new round of severe storms spanning the midwest tonight treating fresh have. good evening to your crime norah o donnell. and we are going to begin our broadcast once again tonight with wild weather in the u.s. it has been our lead story almost every night for the past tendays. and that is because it has been the hottest, wettest start for summer ever in some areas, all made more likely by climate change. the extreme weather is having dire consequences, authorities keepig a close eye tonight on this minnesota dam that is facing imminent failure. in south dakota, entire neighborhoods have been destroyed. and for about 60 million americans, a significant heat wave continues. the good news, it will likely peak in the next few days, but the national weather service warns that heat persisting over