<span></span><header class="Article__Header"><div class="Article__Header__Branding"><p class="Article__ContentFlag Article__ContentFlag--link"><span class="LiveCircle"><span class="LiveCircle-circle"></span><span class="LiveCircle-title-red">APPLENEWS - STORY ADD</span></span></p></div><div class="Article__Headline"><h1 class="Article__Headline__Title">Wildfire smoke live updates: Air quality alerts issued in 20 US states</h1><p class="Article__Headline__Desc">Millions of Americans are on alert for unhealthy air quality.</p></div></header><div class=""><div><div class="FeaturedMedia"><div class="ResponsiveWrapper"><aside class="InlineElement InlineElement--content-width InlineElement--desktop InlineVideo FeaturedVideo" aria-label="Video"><div class="SingleVideo"><div class="MediaPlaceholder relative MediaPlaceholder--16x9 cursor-pointer" aria-hidden="false"><figure class="Image aspect-ratio--parent MediaPlaceholder__Image"><div class="Image__Wrapper aspect-ratio--child"><img aria-hidden="false" alt="" class="" data-mptype="image" src="https://s.abcnews.com/images/US/230627_vod_air_hpMain_16x9_608.jpg" width="100%" height="auto"></div></figure><div class="MediaPlaceholder__Overlay absolute-fill flex flex-center-all"><div aria-hidden="true" class="MediaPlaceholder__Pill items-center absolute flex">0:47</div></div></div><div class="Caption__Wrapper"><div class="Caption"><p class="Caption__Title" aria-hidden="true"><span class="RichText">Chicago air quality hits 'very unhealthy' category </span></p><div class="Caption__TextWrapper"><div class="Caption__Text" aria-live="polite"><span class="Truncate Truncate--collapsed"><span><span class="RichText">The Canadian wildfire smoke has drifted south causing much of the Midwest to have poor air quality. </span></span></span></div></div><span aria-label="ABCNews.com" class="RichText Caption__Credit">ABCNews.com</span></div></div></div></aside></div></div></div></div><div class="ScrollSpy_container"><span></span></div><div class="Developments"><h1 class="Developments__Header">Latest headlines:</h1><ul class="Developments__List"><li class="Developments__ListItem"><a href="https://abcnews.go.com/US/live-updates/canada-wildfire-smoke-us-air-quality/20-us-states-under-air-quality-alerts-100435067?id=100434871">20 US states under air quality alerts</a></li></ul><div class="Developments__Footer">Here's how the news is developing. All times Eastern.</div></div><hr><div><div class="LiveBlog--posts"><div><div class="LiveBlog__post post_100435067"><div class="ScrollSpy_container"><span></span><div class="Post"><div class="Post__Timestamp Post__Timestamp--latest"><a class="AnchorLink" tabindex="0" href="https://abcnews.go.com/US/live-updates/canada-wildfire-smoke-us-air-quality/20-us-states-under-air-quality-alerts-100435067?id=100434871"><div class="undefined--recent">Jun 28, 7:03 AM EDT</div></a></div><h1 class="Post__Header">20 US states under air quality alerts</h1></div><hr></div></div></div></div></div><div class="Article__Footer Article__Footer--news"><div class="StoryDivider StoryDivider--logo"><hr><img alt="ABC News" class="Image Logo Logo__xxxl" data-mptype="image" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" width="100%" height="auto"><hr></div></div><div class="sponsored-headlines relative sl-wrapper w-100 taboola"></div>

Millions of Americans are on alert for unhealthy air quality as smoke from wildfires in neighboring Canada drifts to the United States.{ai:summary}<p>Millions of Americans are on alert for unhealthy air quality as smoke from wildfires in Canada drifts to the United States. The smoke is blanketing large parts of the country, with 20 states currently under air quality alerts. #environment</p>

Wildfire smoke live updates: Air quality alerts issued in 20 US states

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20 US states under air quality alerts

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