thank you for the reporting. jim? well, just another day of extreme heat, historic heat across the country. more than 150 million americans remain under heat alerts. nearly half the country. with many facing triple digits all the way from the southwest to here in the nation s capital. it s hot here, too. in arizona, the record-breaking temperatures are so bad that even cactuses can t take the heat. the desert botanical garden said the saguaros are collapsing. the city s record streak of temperatures over 110 degrees is now in its 28th day. the triple digit heat set to take over parts of the northeast and midwest now. the cnn meteorologist is in the weather center. we talk about it. it is really bad. how bad for how long and what do we do about it? a lot of questions for you.