reporter: a wild weekend weather across the country. tornado warning sirens in chicago tornado. reporter: sightings nearby with heavy rain drenching the city and flooding the streets in detroit, the rain shut down interstates trapping vehicles. meanwhile in the northwest a dome of heat is punishing cities like seattle and portland where the all-time 107-degree temperature record could be shattered this weekend the forecast there expected to break 110 degrees. across the region, at least 25 million people in 6 states are under heat alerts. we are closing for the heat wave. i don t want to risk the lives of my staff or other patrons who might be out here. reporter: others are doing what they can to survive the heat. we brought a lot more ice today. reporter: the olympic track & field trials in eugene, oregon, moving events earlier to beat the worst of the heat. this is a brutal way to make an olympic team reporter: in seattle where more than half of households don t hav
intersection six miles from the albuquerque airport. the pilot and the former police officer and his wife are some of them haves. parts of the country are waking up to extreme weather this morning. forecasters are warning to brace for more heat. in the meantime in the midwest, also dealing with its fair share of bad weather. nbc news correspondent guad venegas has more. reporter: a wild weather weekend across the country. tornado sirens in chicago and sightings nearby. with heavy rain drenching the city and flooding the streets. in detroit, the rain shut down interstates trapping vehicles. meanwhile in the northwest, a dome of heat is punishing cities like seattle and portland where the 107 degree record could be shattered this weekend. the forecast there expected to break 110 degrees. across the region, at least 25