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boston hits the triple digits. new york city cuts its triathlon in half amid the city's longest heat wave in nine years. when will it all end? the severe weather in the midwest now moving east. rob marciano times it all out. the rising concerns over monkeypox. dr. jha says u.s. health officials are now weighing whether to declare a public health emergency, one day after the w.h.o. sounded a global alarm due to a growing outbreak. >> the update from the white house. president biden's physician says his condition is improving significantly and he will continue paxlovid as planned. ma...

>> we're clocking in the surface here over 150 degrees. >> relief is coming, but so are storms, causing more than 1400 flights to be canceled this weekend president biden's covid symptoms are improving significantly according to his doctor, and new information about the race to create a vaccine targeted at the omicron subvariants by this fall pope francis has landed in north america, why he's apologizing to the people of canada today. gas prices are falling. now 65 cents less than the peak one last fight, the veterans who never gave up the effort to honor their fallen brothers ...

our house and coming our way really quickly. >> forced to flee. thousands of acres burn outside yosemite park. firefighters try to beat back the flames. and deadly heat continues to punish the country. 90 million people are suffering in scorching temperatures. many areas hitting the triple digits. "newsroom" starts now. hello, everyone. thank you so much for joining me this sunday. i'm fredricka whitfield. we begin this hour with new developments in the january 6 investigation. today republican liz cheney, the vice chair for the committee, not only put ginni thomas, the wife of u...

Tonight from the cdc. >> reporter: tonight, the biden administration says the u.s. considering whether to declare monkeypox a public health emergency. >> right now, we have over 2,000 cases, but we have ramped up vaccinations, ramped up treatments, ramped up testing, and we're going to continue to look at all sort of policy options. >> reporter: such a declaration would allow the health and human services secretary greater freedom to allocate emergency resources. the world health organization already sounding the highest level of alert over the outbreak, now impacting at least 75 countries wit...

To a huge extent. harry enten, thank you very much. go patriots. >> go bills. >> go bills. hopefully something to cheer about here in the coming days. president biden set to deliver a major speech tomorrow on his plan to stop the spread of the coronavirus delta variant and to boost vaccinations. cnn's john harwood is with us now to preview this. what do you think he's going to be saying? what is he really trying to drive home for americans? >> brianna, getting control of this pandemic is the key to every single thing that joe biden wants to accomplish in his presidency. you were talking earl...