Midwest sees world's worst air quality as wildfire smoke spreads

Smoke from Canadian wildfires is blanketing major cities across the U.S., obscuring iconic skylines and prompting air quality alerts. NBC News’ Maggie Vespa reports.

For more context and news coverage of the most important stories of our day, click here: https://www.nbcnews.com

» Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC
» Subscribe to Here's the Scoop podcast: https://www.nbcnews.com/heres-the-scoop-daily-podcast
» NBC News App: https://apps.nbcnews.com/mobile
» Breaking News Alerts: https://link.nbcnews.com/join/5cj/breaking-news-signup?cid=sm_npd_nn_yt_bn-clip_190621
» Visit NBCNews.Com: http://nbcnews.to/ReadNBC
» Find NBC News on Facebook: http://nbcnews.to/LikeNBC
» Follow NBC News on Twitter: http://nbcnews.to/FollowNBC
» Follow NBC News on Instagram: http://nbcnews.to/InstaNBC

#canada #wildfire #fire