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months. with record low sea ice levels near antarctica, unprecedented surface temperatures in the north atlantic ocean, and the hottest day on earth reached multiple times this week. and that blazing sun priming conditions for ground-level ozone, when pollutants chemically react in the sunlight, prompting air quality alerts for 24 million people today in the northeast. >> that's bad. that's not normal. look at this. >> reporter: the hazy skies aren't as severe as that apocalyptic orange from wildfires smoke last month, but experts say it all adds up as mounting research links air pollution with poor physical and mental health. >> also of confinement >> we're having a public issue of air and lung health, but also of confinement and ferret isolation. >> reporter: emilie, let's circle back to the air quality. i know what we're seeing rite now is elevated ozone. but are we free of the risk from the canadian wildfires? >> reporter: well, lester, forecasters say it's very likely we'll continue to see impacts as canada's wildfire season