Smoke from Canadian wildfires degrades air quality in Midwest cities; Northeast faces flash flooding risks.

Smoke from Canadian wildfires is causing poor air quality in the Midwest, with Minneapolis, Chicago, and Detroit among the top 10 cities globally for worst air quality. Air quality alerts are in effect across multiple states. Meanwhile, heavy rain and thunderstorms in the Northeast have caused flash flooding, and similar conditions are expected to hit the Carolinas and Texas.