and staff issues continue to wreak havoc on the holiday weekend getaway. speak with the faa says today will be the highest level of scheduled flights for the holiday. pour air quality alerts are in effect for millions across the country as smoke from canadian wildfires continues to spread. look how it has expanded from the midwest to all the way down into the deep south. speak of the defendant is not guilty. norah: breaking news. the school resource officer is acquitted of child negligence after not confronting the gunman in the deadliest high school shooting in american history. the secret service arrested a man accused of threatening to blow up former president barack obama s home. his alleged connection to january 6th. georgia s fresh peaches are expensive and scarce. always a diva fruit, preaches generally need 850 hours under 45 degrees fahrenheit to blossom. what worries me is it is becoming a lot more difficult to make peaches. grounded
it would be. reporter: but you still want to make the trip today? we want to see the monuments because this is our last full day here, so. reporter: nearly a third of the population of americus killing at least some impact. in chicago, city officials urged people to limit driving and they open some air-conditioned sellers. it smells like a camp fire. reporter: that the area smelled like a barbecue pit as it blanketed pittsburgh. coaches canceled swim practice near st. louis. they can get into o some prey ririgorous actctivity so w we dt want to expose them to the air quality that time. reporter: in the south, he is the big issue is more than 43 million are under an excessive heat warning. janet shamlian is in houston. reporter: for construction workers like these and so many others, this is their office. there is no relief whatsoever from the heat. right now, the surface temperature where they have been working all day has measured 12. elsewhere, home security video cap